Question

An object is placed between two plane mirrors inclined at an angle theta with each other. What is the total number of images formed?

The answer is given in the photo , but I can't understand the meaning of it. Please see the answer and explain.

Answer 1

• When two plane mirrors are kept at an theta, the number of images is calculated using the following formula

• N= (360/theta) -1

• In the above formula N is the number of images

• If theta = 50 degrees

• Therefore placing the value of the angle in the formula we get

• N=360/5 -1= 6.2

• In such a case the number of images is 6

Answer 2

Answer:

Answer:

If theta is a submultiple of 180°, then the number of images formed,

n=360°/theta - 1

If theta is not a submultiple of 180°, then the number of images formed is the integer next higher than

=360°/theta - 1