Question

How many images of himself can an observer see if two adjacent walls and the ceiling of a rectangular room is mirror surfaced?

• A. 3
• B. 5
• C. 6
• D. 7

Answer 1

The correct option is D 7

by using the formula,

$n=\frac{360}{90}=4,\because n=4here,$

$finalnumberofimagewillbem=n-1=4-1=3$

For mirrors inclined at a right angle in the adjacent walls 3 images are formed. The ceiling mirror will therefore form 3 images of this previous images and another direct image of the observer himself

So total of $3+3+1=7$ images are formed.