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Class 12 NEET Physics Optics Questions Part 1
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Question : 52
Total: 100
A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. When coming out on the opposite parallel face, the red and green ray emerge from
(2004)
Two points propagating in two different non parallel directions
Two points propagating in two different parallel directions.
One point propagating in two different directions.
One point propagating in the same directions.
Validate
Solution:
The velocities of different colours is different in a given medium. Red and green are refracted at different angle of refraction.
sin
i
sin
r
R
=
µ
......(i)
sin
i
sin
r
G
=
µ
....(ii)
sin
r
p
sin
i
p
=
µ
......(iii)
From equations (i), (ii) and (iii), we get
i
=
i
R
=
i
G
Thus two point propagation in two different parallel direction.
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