Question

Assertion) The colour of the scattered light does not depend on the size of the scattering particles.

Reason ) Red light is used as a danger signal because it can travel longer distances through rain and fog.
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Answer 1

Answer:

assertion is false and reason is true

in assertion part the colour of light scattered depends on the size of the particle

bigger particles scatter light of larger wavelength

Explanation:

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Answer 2

Answer : Assertion is False, Reason is correct.

Explanation:

• The molecules of air and other fine particles in the atmosphere have size smaller than the wavelength of visible light. Bigger particles scatter light of larger wavelength.

• As Bigger particles scatter light of larger wavelength. Thus color of the scattered light depend on the size of the scattering particles.

• As the light travels through the atmosphere, small particles of air scatter it. The dispersion of the light is inversely proportional to the fourth power of its wavelength. Because of this, much of the light gets reflected back and can travel longer distances through clouds, fog, dust etc. to effectively enter our eyes.

• Red light is used as danger signal because it is having highest wavelength, less scattering ,hence can travel larger distances.

Hence, Assertion is False and Reason is correct.