Question

# A reflecting surface is represented by the equation x2+y2=a2. A ray travelling in negative x-direction is deviated towards positive y-direction after reflection from the surface at point P. Then co-ordinates of point P are

A
(0.8a,0.6a)
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B
(0.6a,0.8a)
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C
(a2,a2)
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D
None of these
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Solution

## The correct option is D None of theseGiven mirror is circular in nature, so normal passes throught origin. As after reflection ray moves along y axis i+r=90∘ for reflection i=r ⇒2i=90∘⇒i=r=45∘ The ray diagram is as shown. ​​​​​​​For point P x=a√2 and y=a√2 ∴P=(a√2,a√2)

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