Question

a point object is placed midway between two plane mirrors distance 'a' apart. The plane mirror forms an infinite number of images due to multiple reflection. The distance between the nth order image formed in the two mirrors is

(a) 4na
(b) 2na
(c) na/2
(d) n²a​

Answer 1

Answer:

d is the right answer n square a

Answer 2

• From the given question the option (b) 2na is correct.

• As we know that when a point object is placed midway between two planes mirrors distance 'a' apart.

• So that the plane mirror forms an infinite number of images due to multiple reflections.

• Hence the distance between the nth order image formed in the two mirrors is  2na.