Question
For students P, Q, R and S traced the path of a ray of light passing through a glass slab for an angle of incidence 40° and measured the angle of refraction. The values as measured by them were 18°; 22°; 25° and 30° respectively. The student who has performed the experiment methodically is
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P
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Q
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R
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S
Solution
C.
R
The correct option is C.
Given, angle of incidence = 40o
The angle of refraction (r = 25o) measured by student R is most appropriate as per Snell’s law.
According to Snell’s law, we have
and refractive index of glass is 1.5.
