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A point source of light is placed in fro...

A point source of light is placed in front of a plane mirror as shown in Figure.
Determine the length of reflected path of light on the screen `Sigma`

A

`L`

B

`2L`

C

`3L//2`

D

`L//2`

Text Solution

Verified by Experts

The correct Answer is:
C
Ray diagram is as shown in figure
Here, `(SO)/(OP)=(PM)/(RM)rArrRM=2L`
Also, `(ST)/(TQ)=(QM)/(SM)rArr SM=(L)/(2)`
`RS=RM-SM=(3L)/(2)`
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