Physics - Questions and Answers, General Study (GK)

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311.

The amount of light reflected depends upon

(a)the nature of the surface

(b)the smoothness of the surface

(c)the nature of material of the object

(d)all of the above

Comment

Answer is: DNA

312.

When a ray or light enters a glass slab from air

(a)its wavelength increases

(b)its wavelength decreases

(c)its frequency increases

(d)neither its wavelength nor its frequency changes

Comment

Answer is: BNA

313.

'Rainbow' is formed due to a combination of

(a)Dispersion and Focusing

(b)Refraction and Absorption

(c)Refraction and Scattering

(d)Dispersion and total internal Reflection

Comment

Answer is: D

314.

The human eye has a lens which has a

(a)hard surface

(b)varying refractive index

(c)constant refractive index

(d)soft portion at its center

Comment

Answer is: CNA

315.

The absorption of ink by blotting paper involves

(a)viscosity of ink

(b)capillary action phenomenon

(c)diffusion of ink through the blotting

(d)siphon action

Comment

Answer is: BNA

316.

Myopia is due to

(a)older age

(b)shortening of eye ball

(c)elongation of eye ball

(d)irregular changes in the focal length of the eye lens

Comment

Answer is: ANA

317.

Total internal reflection of light is possible when light enters from

(a)vacuum to air

(b)air to glass

(c)water to air

(d)air to water

Comment

Answer is: CNA

318.

Total internal reflection can occur when light tends to pass from

(a)a rarer to a denser medium

(b)a denser to a rarer medium

(c)one medium to another of equal refractive index

(d)none of the above

Comment

Answer is: BNA

319.

When viewed in white light, soap bubbles show colours because of

(a)scattering

(b)diffraction

(c)interference

(d)dispersion

Comment

Answer is: CNA

320.

Chromatic aberration in a lens is caused by

(a)interference

(b)diffraction

(c)reflection

(d)dispersion

Comment

Answer is: DNA

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Physics - Questions and AnswersPage 32

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