If angle fo incidence of a light ray ona plane mirror is 30^(@) , then

1.	If angle fo incidence of a light ray ona plane mirror is 30^(@) , then
Answer» The angle of reflection is `30^(@)` The glancing angle of INCIDENCE is `60^(@)` The angle of deviation is `120^(@)` All of these Solution :Angle of incidence is equal to angle of reflection according to LAWS of reflection. Glancing angle of incidence is equal to the DIFFERENCE between `90^(@)` and angle of incidence. Angle of incidence of deviation is twice the glancing angle of incidence.

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