TNPSC Group 1, 2, 2a, 4, VAO Important Questions & Answers 2020-21 - 2

Question: 6

Diffusion of light in the atmosphere takes place due to

(A) Water vapours

(B) Helium

(C) Dust particles

(D) Carbon dioxide

Question: 7

Young’s experiment established that

(A) Light is both particle and wave

(B) Light is neither particle nor wave

(C) Light consists of particle

(D) Light consists of waves

Question: 8

Line spectrum contains information about

(A) The atoms of the source

(B) The molecules of the source

(C) The atoms of the prism

(D) None of the above

Question: 9

The phenomenon of splitting white light into seven colours is called

(A) Refractive index

(B) Dispersion

(C) Refraction

(D) Reflection

Question: 10

Total internal reflection of light is possible when light enters from

(A) Water to air

(B) Air to water

(C) Vacuum to air

(D) Air to glass