A ray of light makes an angle of 50°with the surface S 1 of the glass slab . It's angle of incidence will be ________
A. 50°
B. 40°
C. 140°
D. 0°
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A ray of light makes an angle of 50°with the surface S 1 of the glass slab . It's angle of incidence will be ________
A. 50°
B. 40°
C. 140°
D. 0°
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Answer:
(B). The incidence angle will be 40°.
Explanation:
Given that,
A light ray makes an angle of 50° with the surface S₁ of the glass slab.
We know that,
The incidence angle makes between the incidence ray and normal line.
So, The angle of incidence will be 40°.
Hence, The incidence angle will be 40°.