Four 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 (A) P (B) Q (C) R (D) S



The correct answer is obtained by the the student R.
Option (C) R.

Thank you.....!!!!
Mark as brainliest of helpful..
Yours, Jahnavi.
3 4 3
According to snells law, sini=sinr*refractive index Therefore answer is C perfectly done by R
3 1 3