In the above figure, P, Q, R and S are, respectively:
(A) Normal
(B) Refracted ray
(C) Incident Ray
(D) Reflected Ray
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (C), (A), (D), (B)
Read the figure using the direction of the arrows and the angles marked.
P — the ray travelling towards the surface in the first medium, making angle i with the vertical line: (C) Incident Ray.
Q — the line perpendicular to the surface at the point of incidence, from which i and r are measured: (A) Normal.
R — the ray going back into the same medium at the same angle i on the other side of the normal: (D) Reflected Ray.
S — the ray that enters the slab and bends, making angle r with the normal: (B) Refracted ray.
Order for P, Q, R, S: (C), (A), (D), (B).