If the plane mirror is rotated through an angle of 40𝑜40 o in the clockwise then the reflected ray is rotated by an angle of:20𝑜20 o clockwise40𝑜40 o anticlockwise60𝑜60 o clockwise80𝑜80 o clockwise
Question
If the plane mirror is rotated through an angle of 40𝑜40 o in the clockwise then the reflected ray is rotated by an angle of:20𝑜20 o clockwise40𝑜40 o anticlockwise60𝑜60 o clockwise80𝑜80 o clockwise
Solution
The reflected ray will be rotated by an angle of 80° clockwise.
Here's why:
When a plane mirror is rotated by a certain angle, the reflected ray rotates by twice that angle. This is due to the law of reflection which states that the angle of incidence is equal to the angle of reflection.
So, if the mirror is rotated 40° clockwise, the reflected ray will rotate 2*40° = 80° in the same direction, which is clockwise.
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