Description : An object which absorbs all colours and reflects none appears: (1) White (2) Grey (3) Blue (4) Black
Last Answer : (4) Black Explanation: A surface that absorbs all colours, reflecting none, is said to be black. Black is not a colour; it absorbs all the colours of the visible spectrum and reflects none of them to the eyes. White is a colour.
Description : An object which absorbs all colours and reflects none appears: (1) white (2) grey (3) blue (4) black
Last Answer : black
Description : Why does a black board appears black in color? (1) It reflects black color (2) It absorbs black color (3) It reflects all colors (4) It absorbs all the colours
Last Answer : (4) It absorbs all the colors Explanation: When white light falls on an opaque body, it absorbs all the colors except one color which it reflects; this reflected color is the color of the body.
Description : A pl ant leaf appears to be green because it (a) Absorbs green light (b) Reflects all but yellow and blue light (c) Reflects green light (d) Absorbs red and yellow light
Last Answer : Ans:(c)
Description : An object which absorbs all colours ap- pears as?
Last Answer : Black
Description : An object which reflects all colours ap- pears as?
Last Answer : White
Description : What pigment reflects orange yellow and red and absorbs the other colors to provide energy for photosynthesis?
Last Answer : Carotenoids.
Description : A moderator __________ the neutrons. (A) Slows down (B) Absorbs (C) Accelerates (D) Reflects
Last Answer : (A) Slows down
Description : A diathermanous substance __________ the thermal radiation completely. (A) Absorbs (B) Reflects (C) Transmits (D) None of these
Last Answer : (C) Transmits
Description : Higher concentration of CO2 in atmosphere (A) Allows visible solar radiation (ultraviolet) of short wave-length to pass through (B) Reflects and absorbs the longer wavelength (infra-red) radiations (C) Prevents solar heat being ... in 'heat trap' i.e., global warming (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : An iron hammer, lying in the sun, appears much hotter than its wooden handle because (a) iron is at a higher temperature (b) iron is darker than wood (c) iron absorbs more heat (d) iron is a good conductor of heat
Last Answer : Ans:(d)
Description : The water from a hand pump is warm in winter because - (1) our body is cold in winter and the water appears to be warm (2) the temperature inside the Earth is higher than the atmospheric ... causes friction which warms up the water (4) inside water comes out and absorbs heat from the environment
Last Answer : (2) the temperature inside the Earth is higher than the atmospheric temperature
Description : The water from a hand pump is warm in winter because - (1) Our body is cold in winter and the water appears to be warm (2) The temperature inside the earth is higher than the atmospheric ... causes friction which warms up the water (4) Inside water comes out and absorbs heat from the environment
Last Answer : (2) The temperature inside the earth is higher than the atmospheric temperature Explanation: In winter, the outside temperature is lower than that of water flowing out of the pump, and therefore, the ... the outside temperature is higher than the water of the pump, and therefore, it feels cold.
Description : The water from a hand pump is warm in winter because (1) Our body is cold in winter and the water appears to be warm (2) The temperature inside the earth is higher than the atmospheric ... causes friction which warms up the water (4) Inside water comes out and absorbs heat from the environment
Last Answer : The temperature inside the earth is higher than the atmospheric temperature
Description : The sky appears blue because – (1) All colours interfere to produce blue (2) In white light, the blue component dominates (3) The atmosphere scatters blue colour more than the others (4) It is actually blue
Last Answer : (3) The atmosphere scatters blue colour more than the others Explanation: Diffuse sky radiation is solar radiation reaching the Earth's surface after having been scattered from the direct solar beam by ... the atmosphere (approximately 25% of the incident radiation when the sun is high in the Sky.
Description : Sun appears red in colour at sun-rise and sunset due to – (1) the fact that sun emits only red colour at that time (2) red light having longer wave length scatters away (3) that sun Comes out of the mountains (4) that all other colours scatter away except red
Last Answer : (4) that all other colours scatter away except red Explanation: According to Rayleigh's law, the intensity of scattered light varies inversely as the fourth power of its wavelength. Sunlight consists of ... have to travel a larger part of the atmosphere because they are very close to the horizon.
Description : Sun appears red in colour at sunrise and sunset due to (1) the fact that sun emits only red colour at that time (2) red light having longer wave length scatters away (3) that sun comes out of the mountains (4) that all other colours scatter away except red
Last Answer : that all other colours scatter away except red
Description : The sky appears blue because (1) all colours interfere to produce blue (2) in white light, the blue component dominates (3) the atmosphere scatters blue colour more than the others (4) it is actually blue
Last Answer : the atmosphere scatters blue colour more than the others
Description : The sky appears blue because the earth’s atmosphere _____? A. Scatters blue light B. Transmits blue light C. Reflects blue light D. Has actual blue cover
Last Answer : ANSWER: C
Description : The sky appears blue because the earth’s atmosphere -----? A. Scatters blue light (Answer) B. Reflects blue light C. Transmits blue light D. Has actual blue cover
Last Answer : A. Scatters blue light (Answer)
Description : which object absorbs the most sound waves?
Last Answer : earplugs
Description : What does an object look like when it absorbs all the light ?
Last Answer : An object appears black when it absorbs all the light.
Description : What is A device that absorbs and draws heat from a hot object dispersing it into the surroundings is which one of the following?
Last Answer : Need answer
Description : A ray of white light strikes the surface of an object. If all the colours are reflected, the surface would appear (1) Black (2) White (3) Grey (4) Opaque
Last Answer : (2) White Explanation: Objects do not have any colour of their own. When light hits a surface, some of it is absorbed and some of it is reflected. The light that is reflected is ... appear white when they reflect all the wavelengths; they appear black when they absorb all visible wavelengths.
Description : A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution? (a) Blue (b) Green (c) Yellow (d) Red
Last Answer : (a) Blue
Description : Warm colours make the object _______ a. Appear larger and nearer to the observer b. Appear far and reduced in size. c. Look dull and depressing. d. Invisible to the viewer.
Last Answer : a. Appear larger and nearer to the observer
Description : Which type of object reflects light best?
Last Answer : A mirror
Description : What is the color of an object that reflects all the colors of light ?
Last Answer : The color of an object that reflects all the colors of light is white.
Description : If white light shines on an object and the object appears blue, this means that?
Last Answer : The object reflects blue light more than it does any other color.
Description : Red light passing through a green object, appears?
Last Answer : Black?
Description : The term Blue Shift' is used to indicate? A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object? B. Turning a star from white ... . In future sun would become blue D. Black hole was blue at its start E. None of these
Last Answer : A. Doppler effect in which an object appears bluer when it is moving towards the observer or observer is moving towards the object?
Description : A virtual image always appears: w) larger than object x) inverted y) erect z) same size as object
Last Answer : ANSWER: Y -- ERECT
Description : A real image always appears: w) larger than object x) inverted y) erect z) same size as object
Last Answer : ANSWER: X -- INVERTED
Description : Can thick diapers absorbs much more than a thin diaper?
Last Answer : Put one of each on, soil yourself, and post some pictures. Then we can make that determination.
Description : A black surface absorbs more heat radiations as compared to a white or a reflecting surface under identical conditions. List two solar devices which make use of this property in their design. -Science
Last Answer : Solar cooker, solar water heater.
Description : What is the The chemical part of the dye that absorbs light and produces colour called? -Do You Know?
Last Answer : answer:
Description : When chlorophyll absorbs light, what does it gets excited and emits? -Do You Know?
Description : In which process of plant protoplasm and cell wall absorbs water ?
Last Answer : The plant absorbs water in the process of protoplasm and cell wall adsorption.
Description : Which element in the atmosphere absorbs ultraviolet rays ?
Last Answer : Ozone in the atmosphere absorbs ultraviolet rays.
Description : Which animal absorbs water through its skin ?
Last Answer : Molecule absorbs water through the skin.
Description : Which element absorbs water vapor ?
Last Answer : : The solid absorbs the main water vapor
Last Answer : Black absorbs more light.
Description : If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N m^(-2)`, then the change in internal energy
Last Answer : If a gas absorbs `200J` of heat and expands by `500 cm^(3)` against a constant pressure of `2 xx 10^(5) N ... . `-100 J` C. `+100 J` D. None of these
Description : A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37.0^(@)C` . As it does so, it absorbs
Last Answer : A piston filled with `0.04` mole of an ideal gas expands reversible from `50.0mL` at a constant temperature of `37. ... J` D. `q= +208 J, w=+208 J`
Description : A system absorbs reversibly 600 J of heat and performs 250 J of work. The increase in the internal energy of system is :-
Last Answer : A system absorbs reversibly 600 J of heat and performs 250 J of work. The increase in the internal energy of system ... J B. 250 J C. 600 J D. 350 J
Description : A dye absorbs a photon of wavelength `lambda` and re`-` emits the same energy into two phorons of wavelengths `lambda_(1)` and `lambda_(2)` respective
Last Answer : A dye absorbs a photon of wavelength `lambda` and re`-` emits the same energy into two phorons of wavelengths ` ... 2))/((lambda_(1)+lambda_(2))^(2))`
Description : A `[M(H_(2)O)_(6)]^(2+)` complex typically absorbs at around 600 nm. It is allowed to react with ammonia to form a new complex `[M(NH_(3))_(6)]^(2+)`
Last Answer : A `[M(H_(2)O)_(6)]^(2+)` complex typically absorbs at around 600 nm. It is allowed to react with ammonia ... A. 800 nm B. 580 nm C. 620 nm D. 320 nm