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A light ray from an object 'P' is reflec...

A light ray from an object 'P' is reflected from a mirror as shown in the figure, then

A

angle of incidence is

B

`PM = MP^1`

C

`angle PON = 120^@`

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
D

From figure
` angle TON = 90^@`
` therefore angle TOQ = angle r =90^@ - 60^@ = 30^@`
` therefore ` angle of reflection ` = 30^@`
But according to the laws of reflection, the angle of incidence (i) = the angle of reflection (r).
` therefore i = 30^@`
(ii) In case of a plane mirror, object distance = image distance.
(iii) `anglePON = anglePOQ + angleQON`
` = angle POT + angle TOQ + angle QON`
` = 30^@ + 30^@ + 60^@`
` = 120^@`
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