SaraNextGen Study App [2023-24]
Last Updated On 01-06-2023 - By Jeesha Sara

Interference was observed in interference chamber when air was present, now the chamber is evacuated and if the same light is used, a careful observer will see

a)

No interference

b)

Interference with bright bands

c)

Interference with dark bands

d)

Interference in which width of the fringe will be slightly increased


Question ID - 150134 :-

Interference was observed in interference chamber when air was present, now the chamber is evacuated and if the same light is used, a careful observer will see

a)

No interference

b)

Interference with bright bands

c)

Interference with dark bands

d)

Interference in which width of the fringe will be slightly increased

1 Answer
5876 Votes
3537

Answer Key : (d) -

(d)

The refractive index of air is slightly more than 1. When chamber is evacuated, refractive index decreases and hence the wavelength increases and fringe width also increases



Next Question :

Light waves can propagate through vacuum but sound waves cannot do so. Mark the wrong statement

a)

Light waves are transverse electromagnetic waves and do not require any medium for their propagation

b)

Sound waves are longitudinal mechanical waves and require inertial and elastic medium for their propagation

c)

Velocity of light for all transparent media is same

d)

Velocity of light for all transparent media is different


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