Physics - Questions and Answers, General Study (GK)

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501.

In a healthy human eye, the focusing is done by the

(a)To and fro movement of the eye lens

(b)Changing curvature of the retina

(c)Change in the convexity of the lens through ciliary muscles

(d)Change in the refractive index of a fluid

Comment

Answer is: C

502.

The chemical part of Dye that absorbs light and produces colour is called

(a)Neon

(b)A Chromosphere

(c)A Photo Chrome

(d)A Pigment

Comment

Answer is: D

503.

Panchromatic photographic film is sensitive to

(a)Light of red colour

(b)Light of yellow colour

(c)Light of violent colour

(d)The entire region of the visible spectrum

Comment

Answer is: D

504.

Two source of wave are called coherent, if

(a)Both have the same amplitude of vibration

(b)Both produce waves of the same wavelength

(c)Both produce waves of the same wavelength having a constant phase difference

(d)Both produce waves having the same velocity

Comment

Answer is: C

505.

In which part of the eye lies the pigment, that decides the colour of the eyes of a person?

(a)Cornea

(b)Choroid

(c)Iris

(d)Vitreous body

Comment

Answer is: B

506.

Optical Fibre work on the principle of

(a)Total internal reflection

(b)Refraction

(c)Scattering

(d)Interference

Comment

Answer is: A

507.

Suppose a rocket ship is receding from the earth at a speed of (1/10)th the velocity of light. A light in the rocket ship appears blue to the passengers on the ship. What colour would it appears to an observer on the earth?

(a)Blue

(b)Orange

(c)Yellow

(d)Yellow - Orange

Comment

Answer is: A

508.

What is viewed through an electron microscope?

(a)Electrons and other elementary particles

(b)Structure of bacteria and viruses

(c)Inside of human stomach

(d)Inside of human eye

Comment

Answer is: B

509.

When a CD (compact disc used in audio and video system) is seen in sunlight. Rainbow like colours are seen. This can be explained on the basis of the phenomenon of

(a)Reflection and diffraction

(b)Reflection and transmission

(c)Diffraction and transmission

(d)Refraction, diffraction and transmission

Comment

Answer is: D

510.

When a Ray of light is refracted by a Prism such that the angle of deviation is minimum, then

(a)The angle of emergence is greater than angle of incidence

(b)The angle of emergence is equal to angle of incidence

(c)The angle of emergence is smaller than angle of incidence

(d)The sum of angle of incidence and the angle of emergence is equal to 90 degree.

Comment

Answer is: B

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Physics - Questions and AnswersPage 51

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