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Why is the angle of deviation twice the angle of incidence?

Why is the angle of deviation twice the angle of incidence?
 

Grade:12

1 Answers

Umakant biswal
5359 Points
5 years ago
Deviation of Light by a Plane-Mirror. A ray of light that is incident on to the surface of a plane-mirror is reflected with the angle of incidence equal to the angle of reflection. ... The total angle between the straight-line path and the reflected ray is twice the angle of incidence. 
as its a perpendicular relationship we have between angle of incidence and normal to the point of incidence , so, its twice , 
there are even mathematical proof , if u want then let me know . 
HOPE IT CLEARS ..

 

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