(a) How are the two plane mirrors in a periscope arranged:

i) with respect to one another?

ii) with respect to the ends of the tube?

(b) What type of image (real or virtual) is formed:

i) in a plane mirror?

ii) on a cinema screen?

iii) in a lake? 

iv) in a pinhole camera?

Asked by Topperlearning User | 28th May, 2014, 05:27: PM

Expert Answer:


i) The two plane mirrors are arranged parallel to one another and their reflecting surfaces face each other.

ii) Each plane mirror make an angle of 45o with respect to the ends (or sides) of the tube.


i) Virtual image

ii) Real image

iii) Virtual image

iv) Real image

Answered by  | 28th May, 2014, 07:27: PM