the colourful world
Assessment
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kanishka sharma
•
Science, Physics
•
10th Grade
•
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10 questions
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1.
Multiple Choice
At noon the sun appears white as
light is least scattered.
all the colours of the white light are scattered away
blue colour is scattered the most.
red colour is scattered the most.
2.
Multiple Choice
Which of the following phenomena of light are involved in the formation of a rainbow?
Reflection, refraction and dispersion
Refraction, dispersion and total internal reflection
Refraction, dispersion and internal reflection
Dispersion, scattering and total internal reflection
3.
Multiple Choice
Twinkling of stars is due to atmospheric
dispersion of light by water droplets
refraction of light by different layers of varying refractive indices
scattering of light by dust particles
internal reflection of light by clouds
4.
Multiple Choice
The clear sky appears blue because
blue light gets absorbed in the atmosphere.
ultraviolet radiations are absorbed in the atmosphere.
violet and blue lights get scattered more than lights of all other colours by the atmosphere.
light of all other colours is scattered more than the violet and blue colour lights by the atmosphere.
5.
Multiple Choice
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light
is scattered the most by smoke or fog.
is scattered the least by smoke or fog.
is absorbed the most by smoke or fog.
moves fastest in air.
6.
Multiple Choice
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
Dispersion of light
Scattering of light
Total internal reflection of light
Reflection of light from the earth
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