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ICSE Class 9 Answered

Explain the effect of rotation on a plane mirror with diagram?  
Asked by Rp1298908 | 24 Oct, 2018, 08:48: AM
answered-by-expert Expert Answer
For diagram refer the previously answered question, click on the link given below:
Effect of rotation of plane mirror diagram
 
Answer to the question is as follows:
Consider that before the mirror is rotated the angle of incidence is Θ. When mirror is rotated through and angle of say 'Φ' then the normal is also rotated by an angle Φ and thus the angle of incidence becomes Θ + Φ and thus angle of reflection increases to Θ + Φ.
For fixed incident ray, angle of reflection is = twice the angle through which the mirror is rotated.
Thus, angle of reflection = 2 Φ
 
Answered by Shiwani Sawant | 24 Oct, 2018, 10:43: AM

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