Light colours absorb less heat therefore these are not heated as much as the black colour.

Light colours absorb less heat therefore these are not heated as much as the black colour.
by

1 Answer

Answer :

Ans: Dark colours do not exactly absorb more heat, but they do convert a higher percentage of light into heat. In the sun with a dark coloured shirt it gets hot, where a lighter coloured shirt would not get nearly as hot. This is due to the amount of light being absorbed by the colour. The lighter the colour the smaller is the range of visible light being absorbed and converted into heat. White objects reflect all visible light, where black objects absorb all visible light.
by

Related questions

Soaps come in different colours. But why is soap's lather always white in colour?

Description : Soaps come in different colours. But why is soap's lather always white in colour?

Last Answer : Lather or foam is nothing but a large collection of small soap bubbles. A soap bubble is , in turn, a very thin film of soap solution enclosing some air. Because of the low surface tension of ... collection of bubbles gets scattered. That is the reason why all kinds of lather or foam appear white.

What will be the colour of grass in blue light?

Description : What will be the colour of grass in blue light?

Last Answer : Ans: Grass will appear blackish in colour in blue light because it has the property of absorbing all other colours except its own colour. The blue rays falling on grass will be absorbed by it, and it will appear dark coloured.

Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Description : Sodium vapour lamps glow with yellow colour. This is due to - (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Last Answer : (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum Explanation: Sodium Vapour Lamps glow with yellow colour due to the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum.

Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Description : Sodium vapour lamps glow with yellow colour. This is due to (1) sublimation of sodium to emit yellow colour (2) the emission of excess energy absorbed by sodium atoms, in the yellow region of the ... (3) the low ionisation energy of sodium (4) its ability to absorb all other colours except yellow

Last Answer : the emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum

What is the difference between a sodium vapour lamp, Which gives out a yellowish colour illumination, and a mercury vapour lamp that gives out a white colour illumination?

Description : What is the difference between a sodium vapour lamp, Which gives out a yellowish colour illumination, and a mercury vapour lamp that gives out a white colour illumination?

Last Answer : Answer I: The light in Sodium Vapour lamp is from an atomic emission process whereas in Mercury Vapour Lamp it is, finally, from fluorescence emission. The mechanism of light emission in a sodium ... from a fluorescent lamp is moderate (60 lumens/watt) while the color-rendering index is high.

Colour blindness is more common in men than women.

Description : Colour blindness is more common in men than women.

Last Answer : Ans: Women have the sex chromosomes XX, while men have the chromosomes XY. The gene for normal colour vision is found on the X-chromosome. If a woman has one Xchromosome with the gene ... colour vision gene. This is less probable mathematically than having just one X-chromosome missing the gene.

What is a black hole? Why is it called so?

Description : What is a black hole? Why is it called so?

Last Answer : Ans: A black hole is a super dense planetary material formed due to the death of a star of mass more than five solar masses. It is called black hole because any particle or photon approaching its surface is just swallowed by it. It appears black, as radiation is neither emitted nor reflected by it.

Why is petroleum often called black gold?

Description : Why is petroleum often called black gold?

Last Answer : Ans: Petroleum is often called black gold because of its great demand in the modern industry and for domestic use. It provides fuel for heat and lighting, lubricant for machinery and raw material for a number of industries.

The sky from moon appears black. Why?

Description : The sky from moon appears black. Why?

Last Answer : Ans: as the moon has no atmosphere, so the sky looks completely black when viewed from the moon.

Why is the Earth's core hot? What caused it to heat up? Is it still heating, or now cooling?

Description : Why is the Earth's core hot? What caused it to heat up? Is it still heating, or now cooling?

Last Answer : Scientists estimate that temperature at the Earth's core is about 5538{+0}C. Much of the heat inside the Earth today comes from elements that were present when the planet was first formed billions of years ... function of their half-life. Therefore, Earth's core is not heating up, it's cooling down.

How heat is suddenly generated to the extent of 50,000 Fahrenheit during lightning?

Description : How heat is suddenly generated to the extent of 50,000 Fahrenheit during lightning?

Last Answer : Lightning is essentially an electrical discharge through gases. During the course of formation and segregation of clouds, some clouds lose electrons and acquire positive charge and others collect those ... large, the heat liberated reaches suddenly to even 50,000 degrees Fahrenheit during lightning.

People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million. This is because at high altitude (a) people eat more nutritive food, therefore more RBCs are formed (b) people get pollution-free air to breath and more oxygen is available (c) atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive (d) there is more UV radiation which enhances RBC production.

Description : People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million. This is because at high altitude ... required amount of O2 to survive (d) there is more UV radiation which enhances RBC production.

Last Answer : (c) atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive

How does a compact fluorescent lamp consume less electricity than conventional fluorescent lamps and bulbs?

Description : How does a compact fluorescent lamp consume less electricity than conventional fluorescent lamps and bulbs?

Last Answer : Fluorescent lamps are based on the phenomenon of gas discharge between two electrodes at the ends of a glass tube. Generally these tubes contain a little mercury in the low-pressure vapour phase. When ... poor efficiency. The three types of lamps may have a typical efficiency ratio of 8:6:3.

How does ballast-less track provide safe travel?

Description : How does ballast-less track provide safe travel?

Last Answer : ANSWER I: Ballast is a prime component of the track that acts as a vibrant medium to transmit from the rail surface the weight of the train down to the formation, the wells set on ... cost involved in laying a ballast-less track is more initially but it requires less recurring maintenance cost.

Why does a swimming pool appear less deep than it really is?

Description : Why does a swimming pool appear less deep than it really is?

Last Answer : Ans: When rays of light start from the bottom of a pool and travel from water to air, they are refracted away from the normal because they travel from a denser medium to a rarer medium. As a ... image of bottom is formed above the bottom. Hence, a swimming pool appears less deep than it really is.

The weight of the object is less at the equator than at the poles.

Description : The weight of the object is less at the equator than at the poles.

Last Answer : Ans: The weight of an object is the product of mass and force of gravity. The equatorial diameter is more than the polar diameter. Thus, the force of gravity is more at the poles and the weight is more there.

Purpose of an optical filter is to – (1) reflect lights of different colours (2) dispense light into component colours (3) refract light of different colours (4) transmit or absorb light of different colours

Description : Purpose of an optical filter is to – (1) reflect lights of different colours (2) dispense light into component colours (3) refract light of different colours (4) transmit or absorb light of different colours

Last Answer : (4) transmit or absorb light of different colours Explanation: Optical filters are devices that selectively transmit light in a particular range of wavelengths, that is, colors, while ... as absorptive filters), fluorescence microscopy, spectroscopy, clinical chemistry, colour stage lighting, etc.

Purpose of an optical filter is to (1) reflect lights of different colours (2) dispense light into component colours (3) refract light of different colours (4) transmit or absorb light of different colours

Description : Purpose of an optical filter is to (1) reflect lights of different colours (2) dispense light into component colours (3) refract light of different colours (4) transmit or absorb light of different colours

Last Answer :  transmit or absorb light of different colours

When a lighted matchstick is shown before another light source, the shadow of the matchstick is formed on a screen but not the shadow of the flame. Why is it so?

Description : When a lighted matchstick is shown before another light source, the shadow of the matchstick is formed on a screen but not the shadow of the flame. Why is it so?

Last Answer : A shadow is a lightless (dark) region formed beyond an opaque object in the direction opposite to the source of light. An opaque object that comes in the way of light prevents the light that is due ... cannot prevent the light from the other source too. Hence the shadow of the flame is not formed.

How is the light produced when an object is burnt?

Description : How is the light produced when an object is burnt?

Last Answer : A chemical reaction is a simple rearrangement of atoms leading to formation of newer substances (products). Hence, to favour the rearrangement, breaking of bonds in the reactants and making of bonds between ... the breaking of bonds. The net energy is liberated in the form of both light and heat.

When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy state, they emit light, which we can observe in - (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence

Description : When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy state, they emit light, which we can observe in - (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence

Last Answer : (3) Emission spectra Explanation: When a metal atom is strongly heated, its electrons absorb the heat energy and jump to a higher energy level. When the electron returns to its original position it ... to the energy the electron has released at each stage °fits fall back to its original state.

When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence

Description : When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in (1) Raman spectra (2) Absorption spectra (3) Emission spectra (4) Fluorescence

Last Answer : Emission spectra

Lunar eclipse last much longer than solar eclipse.

Description : Lunar eclipse last much longer than solar eclipse.

Last Answer : Ans: Lunar eclipse last longer than the solar eclipse because the length of the earth’s umbral shadow cone is more than three times the average distance between the moon and the earth, so the shadow is relatively wide at the point where the moon crosses it.

A colour-blind person cannot – (1) See distant objects (2) See black colour (3) Distinguish between certain colours (4) Have persistence of vision

Description : A colour-blind person cannot – (1) See distant objects (2) See black colour (3) Distinguish between certain colours (4) Have persistence of vision

Last Answer : (3) Distinguish between certain colours Explanation: Colour blindness or colour vision deficiency is the inability or decreased ability to see coluor, or perceive colour differences, under normal lighting ... to the optic nerve. This type of colour blindness is usually a sex-linked condition.

A colour-blind person cannot (1) see distant objects (2) see black colour (3) distinguish between certain colours (4) have persistence of vision

Description : A colour-blind person cannot (1) see distant objects (2) see black colour (3) distinguish between certain colours (4) have persistence of vision

Last Answer : distinguish between certain colours

What causes milk to rise up when we boil it?

Description : What causes milk to rise up when we boil it?

Last Answer : Milk contains 87 per cent water, 4 per cent proteins and 5 per cent lactose (milk sugar). When we boil milk, the fat, sugar, proteins and minerals get separated. Since they are lighter than ... vapour pressure raises the creamy layer. So the milk pushes the creamy layer out and milk spills out.

Why does an egg (with the shell) burst when cooked in a microwave oven?

Description : Why does an egg (with the shell) burst when cooked in a microwave oven?

Last Answer : Microwave radiation is generated in an electronic tube called a magnetron, and passes along what's called a wave-guide into the oven cavity. The microwaves are absorbed by foods - a characteristic that ... encourages even cooking and (if we forget to prick the yolk) helps to confine the explosion.

Why is fuel used in airplanes different from those used in motor vehicles?

Description : Why is fuel used in airplanes different from those used in motor vehicles?

Last Answer : Aviation turbine fuels are used for powering jet and turbo-prop engine aircraft. Kerosene was used to fuel the first turbine engines. Kerosene-type fuel was chosen as having the best ... is only significant demand in very cold climates where its better cold weather performance is important.

How does a rechargeable battery work? What is the life of such batteries and how are they different from ordinary batteries?

Description : How does a rechargeable battery work? What is the life of such batteries and how are they different from ordinary batteries?

Last Answer : Electrochemical cells and batteries are identified generally as primary and secondary batteries. The primary batteries cannot be easily or effectively re-charged electrically and hence are discharged (used ... cycles (one cycle represents one discharge and charge) depending on its design parameters.

What is the peculiar smell of the earth after the first shower?

Description : What is the peculiar smell of the earth after the first shower?

Last Answer : ANSWER I: The characteristic earthy odour of soil is caused by the production of a series of streptomycete metabolites called geosmins. These substances are sesquiterpenoid compounds and unsaturated compound ... ) is the microbial product found in the spores is responsible for the pleasant smell.

How is a ventriloquist able to throw his voice?

Description : How is a ventriloquist able to throw his voice?

Last Answer : ANSWER I : Ventriloquism is the art of projecting or `throwing,' the voice so that is appears to come from a different source. The performer also directs the attention of the audience to the place from where ... of light that hits it, while the ear isn't so sensitive to the direction of a noise.

Does frequent switching on/off of a fluorescent lamp reduce its life?

Description : Does frequent switching on/off of a fluorescent lamp reduce its life?

Last Answer : The life of a fluorescent lamp is essentially determined by life of the cathode filament it uses. A conventional fluorescent lamp employs closely wound coil of tungsten wire as filament. Upon switching on ... of continuous burning can be halved or made still less, just by frequent switching on/off.

How do touch screens work?

Description : How do touch screens work?

Last Answer : Touch screen monitors - where you can use your finger on the computer screen to navigate through the contents - have become more and more commonplace over the past decade, particularly at public information ... allowing a touch with almost any object - except hard and small objects like a pen tip.

How does the solar wind affect Earth?

Description : How does the solar wind affect Earth?

Last Answer : Solar wind contains intense clouds of high energy particles which are produced by solar storms. These clouds of particles affect Earth. These clouds are called coronal mass ejections. They reach the earth ... by the solar wind, especially the storm clouds that the Sun launches our way very often.

Why is the @ symbol used in an email address?

Description : Why is the @ symbol used in an email address?

Last Answer : ANSWER I: The e-mail address generally has two parts, user id and the domain name. The @ (at) symbol is used to separate the user id from the domain name in the e-mail address. The e- ... reached on the Internet by giving the email address (also called the User's Uniform Resource Locator (URL)).

What is Polaroid sunglasses made of?

Description : What is Polaroid sunglasses made of?

Last Answer : ANSWER I: Polaroids are thin and large sheets of crystalline polarising material (made artificially) capable of producing plane polarised beams of large cross section. As early as 1852, it was ... to return to their original shape, resulting in the loss of their light absorbing properties.

Why does rain come in drops and not in a continuous stream?

Description : Why does rain come in drops and not in a continuous stream?

Last Answer : When warm wet air rises, it cools and water vapour condenses to form clouds. A cloud is made of small drops of water or ice crystals, depending on its height and how cold its surrounding air is. ... Giant droplets fall rapidly. Thus drops keep on falling side by side and not in a continuous stream.

How is carbon dioxide removed from blood before it is exhaled?

Description : How is carbon dioxide removed from blood before it is exhaled?

Last Answer : In humans, carbon dioxide is generated in the tissues during oxidation of glucose, in order to liberate energy, which is resumed to perform body functions. Before exhalation through lungs the gas is transported ... than the tissue capillaries. Nearly 23 per cent of CO{-2} is transported this way.

How do certain species of birds such as Humming Birds, Terns, Gulls and Kestrels remain in the air without a forward motion?

Description : How do certain species of birds such as Humming Birds, Terns, Gulls and Kestrels remain in the air without a forward motion?

Last Answer : ANSWER I: The humming bird's wings consist mainly of elongated hand bones to which the flight feathers are attached, and the whole wing can rotate as does the wrist. The short arm bones not ... only birds which can fly forwards, backwards, up, down, sideways or move instantaneously in any direction.

What is Computer Simulation Technique?

Description : What is Computer Simulation Technique?

Last Answer : ANSWER I: `Simulation' in general terms can be defined as the representation or imitation of a system in its realistic form. When a computer program is used to create a model to mimic a ... frame, combustion, and weather and ocean circulation are some of the examples that need huge computer power.

Do animals also have blood groups like humans?

Description : Do animals also have blood groups like humans?

Last Answer : In man blood group is applied to single factor. This factor is agglutinogen and is also called antigen. It is found on the surface of red blood corpuscles. Accordingly a person with `A ... set off strong transfusion reactions. Such reaction can occur on the second or on subsequent blood transfusion.

Why does sea water not erode coastal areas in all places?

Description : Why does sea water not erode coastal areas in all places?

Last Answer : The main cause of coastal erosion is the kinetic energy of wind. The main medium of transmission of wind energy is through wind generated water waves. Occasionally waves are also generated by other ... littoral drift (as in Chennai Marina), stopped by the harbour structures jutting into the sea.

How does scratching cure itching sensation?

Description : How does scratching cure itching sensation?

Last Answer : Very sensitive, rapidly adapting, mechanoreceptive free nerve endings that elicit only the tickle and itch sensation are found almost exclusively in the superficial layers of the skin. This sensation ... The anterolateral system is a cruder type of transmission system than the dorsal column system.

In the past, why was injection administered in the stomach for dog bite?

Description : In the past, why was injection administered in the stomach for dog bite?

Last Answer : ANSWER I: This is the only disease where the vaccine is given after the exposure (post- exposure). Nervous tissue vaccine (NTV), is one of the vaccines administered for dog bite. This vaccine is ... it does not require a subcutaneous layer. Hence, it can be given in the buttocks or arm region.

What is the pH of rainwater? Is the pH suitable for drinking?

Description : What is the pH of rainwater? Is the pH suitable for drinking?

Last Answer : The technical definition of pH is that it is a measure of the activity of the hydrogen ion (H+). It is essentially a measure of acidity. The pH scale ranges from 0 -14. In the ... of rainwater tends to fall drastically, rainfall is highly acidic and the water thereby becomes unfit for consumption.

What is the difference between TV screen and computer monitor?

Description : What is the difference between TV screen and computer monitor?

Last Answer : ANSWER I: Computer monitors are capable of accepting signals only from the central processing unit of a computer. Therefore they are unable to reproduce a colour image from a composite video signal ... prevent flicker. This requires electronics that operate twice the speed as that of a television.

Like ordinary paints do metallic paints also fade?

Description : Like ordinary paints do metallic paints also fade?

Last Answer : Metallic paints do fade. It depends on the quality and the type of the aluminium paste used. Usually in most of the metallic paints, the commonly used pigment is aluminium pigment in the form of ... a short period of coating, whereas cars coated with metallic paints shine even after a long time.

How does a lightning arrestor work?

Description : How does a lightning arrestor work?

Last Answer : ANSWER I: Lightning, is a form of visible discharge of electricity between rain clouds or between a rain cloud and the earth. The electric discharge is seen in the form of a brilliant arc, ... a cone of protection, which has a ground radius approximately, equal to its height above the ground.

Why do houseflies rub their front legs together?

Description : Why do houseflies rub their front legs together?

Last Answer : Housefly (Musca Domestica) is a common insect found in all places. It has a very short life span. Adult houseflies feed on human and animal food and waste materials and often use buildings as ... whenever a housefly rubs its legs, lakhs of bacteria are discharged from the legs for each rubbing.

Why do lips become dry during winter?

Description : Why do lips become dry during winter?

Last Answer : Our skin is endowed with both cold and warmth receptors. There are more cold receptors than warmth receptors. Therefore peripheral detection of temperature mainly concerns detecting cool and cold ... of infarction necrosis of affected areas even after the temperature begins to return towards normal.