Red is used as an emergency or danger signal as (1) it is a striking colour (2) its wavelength is the longest (3) it is scattered (4) it has very high energy

Red is used as an emergency or danger signal as (1) it is a striking colour (2) its wavelength is the longest (3) it is scattered (4) it has very high energy
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its wavelength is the longest
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Red is used as an emergency or danger signal as – (1) it is a striking colour (2) its wavelength is the longest (3) it is scattered (4) it has very high energy

Description : Red is used as an emergency or danger signal as – (1) it is a striking colour (2) its wavelength is the longest (3) it is scattered (4) it has very high energy

Last Answer : (2) its wavelength is the longest Explanation: The effect of scattering is inversely related to the fourth power of the wavelength of a colour. Red has the highest wavelength of all the colours and is able to travel the longest distance through fog, rain, and the alike.

The colour of scattered light depends on (a) Size of scattering particles (b) Wavelength of light (c) Both (a) and (b) (d) None of the above

Description : The colour of scattered light depends on (a) Size of scattering particles (b) Wavelength of light (c) Both (a) and (b) (d) None of the above

Last Answer : (c) Both (a) and (b)

which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the atmosphere. (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir. d) The fine particles in the atmospheric air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.

Description : which of the following statements is not true for scattering of light? (a) Colour of the scattered tight depends on the size of particles of the atmosphere. (b) Red light is least scattered in the ... air scatter the blue, light more strongly than red. So the scattered blue light enters our eyes.

Last Answer : (c) Scattering of light Lakes place as various colours of white light travel with different speed in fir.

Which of the following colour is least scattered by fog, dust or smoke : A. Violet B. Blue C. Red D. Yellow

Description : Which of the following colour is least scattered by fog, dust or smoke : A. Violet B. Blue C. Red D. Yellow

Last Answer : C. Red

The colour of the ocean appears to be blue because the sunlight falling on it is – (1) reflected (2) refracted (3) diffracted (4) scattered

Description : The colour of the ocean appears to be blue because the sunlight falling on it is – (1) reflected (2) refracted (3) diffracted (4) scattered

Last Answer : (4) scattered Explanation: The reason the ocean is blue is due to the absorption and scattering of light. The blue wavelengths of light are scattered, similar to the scattering of blue light in the sky ... the red and weak in the blue, thus red light is absorbed quickly in the ocean leaving blue.

The colour of the ocean appears to be blue because the sunlight falling on it is (1) reflected (2) refracted (3) diffracted (4) scattered

Description : The colour of the ocean appears to be blue because the sunlight falling on it is (1) reflected (2) refracted (3) diffracted (4) scattered

Last Answer : scattered

Colour used as danger signal?

Description : Colour used as danger signal?

Last Answer : Red

The danger signals are red while the eye is more sensitive to yellow because – (1) absorption in red is less than yellow and hence red is visible from a distance (2) scattering in yellow light is less than red (3) the wavelength of red light is more than yellow light (4) none of the above reasons

Description : The danger signals are red while the eye is more sensitive to yellow because – (1) absorption in red is less than yellow and hence red is visible from a distance (2) scattering in yellow light is less than red (3) the wavelength of red light is more than yellow light (4) none of the above reasons

Last Answer : (3) the wavelength of red light is more than yellow light

Which of the following colors of visible light has the longest wavelength? Is it: w) violet x) green y) yellow z) red

Description : Which of the following colors of visible light has the longest wavelength? Is it: w) violet x) green y) yellow z) red

Last Answer : ANSWER: Z -- RED

The reddish hue of the Sun at sunset is due to the fact that (a) Sunlight is polarized horizontally when scattered by molecules of the atmosphere (b) Light of short wavelength is scattered more effectively by the atmosphere than light of long wavelength (c) Light of short wavelength is scattered less effectively than light of long wavelength (d) Sunlight is polarized vertically when scattered by molecules of the atmosphere

Description : The reddish hue of the Sun at sunset is due to the fact that (a) Sunlight is polarized horizontally when scattered by molecules of the atmosphere (b) Light of short wavelength is ... than light of long wavelength (d) Sunlight is polarized vertically when scattered by molecules of the atmosphere

Last Answer : Ans:(b)

Assertion : Rainbow is an example of the dispersion of sunlight by the water droplets. Reason: light of shorter wavelength is scattered much more than light of longer wavelength (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is not the correct explanation of A.(c) A is true but R is false. (d) A is false but R is true.

Description : Assertion : Rainbow is an example of the dispersion of sunlight by the water droplets. Reason: light of shorter wavelength is scattered much more than light of longer wavelength (a) Both A and R are true and R is the correct ... of A.(c) A is true but R is false. (d) A is false but R is true.

Last Answer : (c) A is true but R is false.

The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of A.300-400nm B.400-500nmC.500-600nm D.600-700nm

Description : The cell mass can be measured optically by determining the amount of light scattered by a suspension of cells. The measurements are usually at a wavelength of A.300-400nm B.400-500nm C.500-600nm D.600-700nm

Last Answer : D.600-700nm

What is true for intensity of scattered light according to Rayleigh’s law? A. The intensity for scattering for light of largest wavelength more B. The light of smallest wavelength will be scattered more C. All the wavelengths are scattered equally D. Intensity of light is not affected by scattering

Description : What is true for intensity of scattered light according to Rayleigh's law? A. The intensity for scattering for light of largest wavelength more B. The light of smallest wavelength will be scattered ... C. All the wavelengths are scattered equally D. Intensity of light is not affected by scattering

Last Answer : B. The light of smallest wavelength will be scattered more

In the Tyndall Effect, the intensity of scattered radiation is inversely proportional to the fourth power of the wavelength. Which one of the following colors of light would exhibit the most intense Tyndall scattering? w) yellow x) green y) orange z) violet

Description : In the Tyndall Effect, the intensity of scattered radiation is inversely proportional to the fourth power of the wavelength. Which one of the following colors of light would exhibit the most intense Tyndall scattering? w) yellow x) green y) orange z) violet 

Last Answer : ANSWER: Z -- VIOLET 

The colour of the ocean appears blue because the sunlight falling on it is (a) Reflected (b) Refracted (c) Absorbed (d) Scattered

Description : The colour of the ocean appears blue because the sunlight falling on it is (a) Reflected (b) Refracted (c) Absorbed (d) Scattered

Last Answer : Ans:(d)

Which one of the following colours has the longest wavelength? A. Yellow B. Blue C. Red D. Green

Description : Which one of the following colours has the longest wavelength? A. Yellow B. Blue C. Red D. Green

Last Answer : ANSWER: C

Which one of the following colours has the longest wavelength? A. Yellow B. Blue C. Red D. Green

Description : Which one of the following colours has the longest wavelength? A. Yellow B. Blue C. Red D. Green

Last Answer : ANSWER: C

What are the properties of scattered heat energy ?

Description : What are the properties of scattered heat energy ?

Last Answer : 1) Inert medium is not required to conduct radiant heat energy , or even if there is inert medium it does not heat it. 2) The scattered heat energy is carried out at the speed of ... heat energy like Ala reflects the law of refraction. It also causes interference , diffraction and polarization .

An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: w) momentum but not energy x) neither momentum nor energy y) energy but not momentum z) both momentum and energy

Description : An x-ray photon collides with a free electron, and the photon is scattered. During this collision there is conservation of: w) momentum but not energy x) neither momentum nor energy y) energy but not momentum z) both momentum and energy

Last Answer : ANSWER: Z -- BOTH MOMENTUM AND ENERGY 

Danger signals are generally red as red light – (1) is least bright (2) undergoes least deviation (3) has lowest velocity (4) gives comfort to eye

Description : Danger signals are generally red as red light – (1) is least bright (2) undergoes least deviation (3) has lowest velocity (4) gives comfort to eye

Last Answer : (2) undergoes least deviation Explanation: The primary reason why the colour red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely ... red which has the highest wavelength of all the colours we can see is scattered the least.

Danger signals are generally red as red light (1) is least bright (2) undergoes least deviation (3) has lowest velocity (4) gives comfort to eye

Description : Danger signals are generally red as red light (1) is least bright (2) undergoes least deviation (3) has lowest velocity (4) gives comfort to eye 

Last Answer : undergoes least deviation 

Red light is used for signals because it has – (1) long wavelength (2) high intensity (3) high frequency (4) low refraction in the medium

Description : Red light is used for signals because it has – (1) long wavelength (2) high intensity (3) high frequency (4) low refraction in the medium

Last Answer : (1) long wavelength Explanation: Red is the international colour of stop signs and stop lights on highways and intersections because it is scattered the least by air molecules. The effect of scattering is ... the colours and is able to travel the longest distance through fog, rain, and the alike.

Red light is used for signals because it has (1) long wavelength (2) high intensity (3) high frequency (4) low refraction in the medium

Description : Red light is used for signals because it has (1) long wavelength (2) high intensity (3) high frequency (4) low refraction in the medium

Last Answer : long wavelength

Colour used in laboratory for indicating danger?

Description : Colour used in laboratory for indicating danger?

Last Answer : Yellow

In Rutherford's experiment involving the deflection of alpha particles by atomic nuclei, the fact that some of the alpha particles bombarding the thin gold foil were back-scattered, led to one of the following conclusions. It was concluded that: w) the charge of an electron is negative x) the nucleus of a gold atom carries all its charge y) most of the mass of a gold atom is in its nucleus z) the nucleus of a gold atom occupies nearly the entire space of the atom

Description : In Rutherford's experiment involving the deflection of alpha particles by atomic nuclei, the fact that some of the alpha particles bombarding the thin gold foil were back-scattered, led to one of the ... its nucleus z) the nucleus of a gold atom occupies nearly the entire space of the atom

Last Answer : ANSWER: Y -- MOST OF THE MASS OF A GOLD ATOM IS IN ITS NUCLEUS

Differential method for analysing the kinetic data is used (A) For testing complicated mechanisms (B) When the data are scattered (C) When rate expressions are very simple (D) None of these

Description : Differential method for analysing the kinetic data is used (A) For testing complicated mechanisms (B) When the data are scattered (C) When rate expressions are very simple (D) None of these

Last Answer : (A) For testing complicated mechanisms

When a strong beam of light is passed through a colloidal solution, the light will – (1) be scattered (2) pass unchanged (3) be absorbed (4) be reflected

Description : When a strong beam of light is passed through a colloidal solution, the light will – (1) be scattered (2) pass unchanged (3) be absorbed (4) be reflected

Last Answer : (1) be scattered Explanation: When a strong beam of light is passed through a colloidal solution, the light will be scattered.

Davisson and Germer scattered electrons from a crystal of nickel. The scattered electrons formed a strong diffraction pattern. What important conclusion was drawn from this experiment?

Description : Davisson and Germer scattered electrons from a crystal of nickel. The scattered electrons formed a strong diffraction pattern. What important conclusion was drawn from this experiment?

Last Answer : ANSWER: ELECTRONS ACTED LIKE WAVES

When a strong beam of light is passed through a colloidal solution, the light will (1) be scattered (2) pass unchanged (3) be absorbed (4) be reflected

Description : When a strong beam of light is passed through a colloidal solution, the light will (1) be scattered (2) pass unchanged (3) be absorbed (4) be reflected

Last Answer : be scattered

A color with a wavelength longer than that of yellow is: w) red x) blue y) violet z) green

Description : A color with a wavelength longer than that of yellow is: w) red x) blue y) violet z) green

Last Answer : ANSWER: W -- RED

What is the wavelength of red light emitted by a helium-neon laser? w) 122 nanometers x) 633 nanometers y) 2.43 picometers z) 1.37 micrometers

Description : What is the wavelength of red light emitted by a helium-neon laser? w) 122 nanometers x) 633 nanometers y) 2.43 picometers z) 1.37 micrometers

Last Answer : ANSWER: X -- 633 NANOMETERS (actually 632.8 nm)

Arrange the following group of colored lights in the order of INCREASING wavelength: RED, ORANGE, GREEN, BLUE

Description : Arrange the following group of colored lights in the order of INCREASING wavelength: RED, ORANGE, GREEN, BLUE

Last Answer : ANSWER: BLUE, GREEN, ORANGE, RED

Which light has the longest wavelength ?

Description : Which light has the longest wavelength ?

Last Answer : Red light has the longest wavelength.

Find longest wavelength in Lyman series of hydrogen atom spectrum.

Description : Find longest wavelength in Lyman series of hydrogen atom spectrum.

Last Answer : Find longest wavelength in Lyman series of hydrogen atom spectrum. A. 1216Å B. 216Å C. 1016Å D. 116Å

Calculate the Rydberg constant `R` if `He^(+)` ions are known to have the wavelength difference between the first (of the longest wavelength) lines of

Description : Calculate the Rydberg constant `R` if `He^(+)` ions are known to have the wavelength difference between the first (of the longest wavelength) lines of

Last Answer : Calculate the Rydberg constant `R` if `He^(+)` ions are known to have the wavelength difference between ... series equal to `Delta lambda = 133.7nm`.

In the visible spectrum which colour has the shortest wavelength

Description : In the visible spectrum which colour has the shortest wavelength

Last Answer : Violet

Colour with minimum wavelength is?

Description : Colour with minimum wavelength is?

Last Answer : Violet

Colour with maximum wavelength is?

Description : Colour with maximum wavelength is?

Last Answer : Red

A simple half-wavelength antenna radiates the strongest signal A. at 45 degrees to its axis B. parallel to its axis C. at right angles to its axis D. at 60 degrees to its axis

Description : A simple half-wavelength antenna radiates the strongest signal A. at 45 degrees to its axis B. parallel to its axis C. at right angles to its axis D. at 60 degrees to its axis

Last Answer : C. at right angles to its axis

The danger signals are red not yellow because

Description : The danger signals are red not yellow because

Last Answer : the wavelength of red light is more

The danger signals are red while the eye is more sensitive to yellow because.

Description : The danger signals are red while the eye is more sensitive to yellow because.

Last Answer : The danger signals are red while the eye is more sensitive to yellow because.

The danger level should be marked with a bright red band …… wide centrally over a white band …… wide for a length of……… a) 5 cm, 10 cm, 60 cms* b) 10 cm, 20 cm, 60 cm c) 15 cm, 30 mm, 60 cm d) None of the above

Description : The danger level should be marked with a bright red band …… wide centrally over a white band …… wide for a length of……… a) 5 cm, 10 cm, 60 cms* b) 10 cm, 20 cm, 60 cm c) 15 cm, 30 mm, 60 cm d) None of the above

Last Answer : a) 5 cm, 10 cm, 60 cms*

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

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.

Which colour is formed when Red and Green are mixed? (1) Light blue (2) Yellow (3) White (4) Grey

Description : Which colour is formed when Red and Green are mixed? (1) Light blue (2) Yellow (3) White (4) Grey

Last Answer : (2) Yellow Explanation: Red, green and blue are the primary colors and all other colors can be created from them. When red and green combine, the result is yellow.

Which of the following colour of light deviates least through the prism? (1) yellow (2) green (3) violet (4) red

Description : Which of the following colour of light deviates least through the prism? (1) yellow (2) green (3) violet (4) red

Last Answer : (4) red Explanation: In refracting media like glass prism, water, etc., lights of different colors travel with different speeds. The speed of violet colour is the least, while the speed of red ... violet colour is deviated the most, while red colour is deviated least on passing through the prism.

Which colour of light shows maximum deviation when passed through a prism? (1) Red (2) Green (3) Violet (4) Yellow

Description : Which colour of light shows maximum deviation when passed through a prism? (1) Red (2) Green (3) Violet (4) Yellow

Last Answer : (3) Violet Explanation: When passed through a prism violet colour of light shows maximum deviation. As white light passes through a prism, the voilet component, having the minimum wave length observes the maximum refractive index for the prism and, thus, gets deviated to the maximum extent.

Which colour of light shows maximum deviation when passed through a prism? (1) White (2) Red (3) Violet (4) Green

Description : Which colour of light shows maximum deviation when passed through a prism? (1) White (2) Red (3) Violet (4) Green

Last Answer : (3) Violet Explanation: The angle of deviation, by which the light of a particular wavelength gets deviated on passing through a medium, depends upon the refractive index of the medium, as ... wavelength. The smaller the wavelength of the passing light, the greater is the refractive index observed.

Which colour is the complementary colour of yellow? (1) Blue (2) Green (3) Orange (4) Red

Description : Which colour is the complementary colour of yellow? (1) Blue (2) Green (3) Orange (4) Red

Last Answer : (1) Blue Explanation: Complementary colours are pairs of colours that are of "opposite" hue in some colour model. In colour theory, two colours are called complementary if, when mixed in the proper ... -perceptual colour models, the neutral colours (white, grey, and black) lie along a central axis.

Which combination of colour is the most convenient during day and night time? (1) Organe and blue (2) While and black (3) Yellow and blue (4) Red and green

Description : Which combination of colour is the most convenient during day and night time? (1) Organe and blue (2) While and black (3) Yellow and blue (4) Red and green

Last Answer : (4) Red and green Explanation: Red and green is the most convenient combination during day and night time because of very precise visibility. In modem colour theory, also known as the RGB colour ... almost any colour. This is the principle used to make the colours on computer screen and television.

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

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