Question

When two plane mirrors are kept at 30°, the number of images formed is:

• A. 12
• B. 11
• C. 10
• D. 9

Answer 1

Answer:

B. 11

When two plane mirrors are kept at an angle, the number of images formed can be calculated using the formula:

Formula:

Number of images = (360/θ) - 1

where θ is the angle between the mirrors in degrees.

Calculation:

Given θ = 30°, we can plug in the value:

Number of images = (360/30) - 1
= 12 - 1
= 11