Question

An illuminated object is placed between two plane mirrors mutually perpendicular to each other how many images are formed?

Solution

Correct option is

Three

 

The number n of the images seen is given by  

                               

Where n is the least value of the integer which satisfies this condition. For θ = 90o, the least integral value of n = 3.   

SIMILAR QUESTIONS

Q1

An observer moves towards a stationary plane mirror at a speed of 4 ms–1. With what speed will his image move towards him?  

Q2

Which mirror should be used to obtain a parallel beam of light from a small lamp?

Q3

Choose the only wrong statement from the following.

Q4

A short linear object of length L lies on the axis of a spherical mirror of focal length f at a distance u from the mirror. Its image has an axial lengthL’ equal to

Q5

Two plane mirrors are placed at right angles to each other. A ray strikes one mirror at an angle of incidence θ such that it is also reflected from the second mirror. Then, the ray reflected from the second mirror will be 

Q6

Two plane mirrors are inclined to each other at an angle of 70o. A ray is incident on one mirror at an angle θ. The ray reflected from this mirror falls on the second mirror from where it is reflected parallel to the first mirror. What is the value of θ? 

Q7

One end of a strip of a plane mirror 2.5 cm in length, is fixed. The other end rests on the top of a small vertical rod. A beam of light is reflected from the mirror and forms a spot on a screen 3 m away from the mirror. If the top of the rod is moved upwards 0.1 mm, what will be the movement of the spot? 

Q8

Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror and parallel to the second is reflected from the second mirror parallel to the first mirror the angle between the two mirrors is   

Q9

A man 1.8 m tall wishes to see full-length image in a plane mirror. The length of the shortest mirror in which he can see his entire image is  

Q10

A 2.0 cm tall object is placed 15 cm from a concave mirror of focal length 10 cm. How far is the image from the mirror?