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Question : 11
Total: 11
(a) What is scattering of light? Explain how the colour of the scattered light depends on the size of the scattering particles.
(b) Explain the reddish appearance of the Sun at sunrise or sunset. Why does it not appear red at noon ?
(b) Explain the reddish appearance of the Sun at sunrise or sunset. Why does it not appear red at noon ?
Solution:
(a) Scattering of light is the phenomenon in which a part of the incident light is dispersed in different directions.
Dependence of colour and scattered light on the size of particles :
(i) When the particles like dust and water droplets present in the atmosphere are large in size, the scattered light appears white.
(ii) When the particles are extremely minute in size, they will scatter blue light present in the white sunlight.
Dependence of colour and scattered light on the size of particles :
(i) When the particles like dust and water droplets present in the atmosphere are large in size, the scattered light appears white.
(ii) When the particles are extremely minute in size, they will scatter blue light present in the white sunlight.
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