Arrange the following steps of an experiment in sequential order to prove the rectilinear propagation of light.
(A) Place a lighted candle towards the wooden upright C facing the hole.
(B) The candle flame is clearly visible which would disappear if one of the uprights is moved.
(C) Take three wooden uprights A, B and C and make a small hole at the same height from the base on each of A, B and C such that they are in a straight line.
(D) Now, look through the hole of upright A.

Options

A. C A D B
B. C D A B
C. A C B D
D. A D C B

Answer

A

Explanation

(A) Take three wooden uprights A, B and C and make a small hole at the same height from the base on eart of A, B and C such that they are in a straight line. (c)
(B) Place a lighted candle towards the upright C facing the hole (a).
(C) Now, look through the hole of upright A (d).
(D) The candle flame is clearly visible which would disappear if one of the uprights is moved (b).