Question

A reflecting surface is represented for equation $x^2$ + $y^2$ = $a^2$. A ray travelling in negative x-direction is directed towards positive y-direction after reflection from the surface at point P. Then co-ordinates of point P are.

• A. (0.8 a, 0.6 a)
• B. (0.6 a, 0.8 a)
• C. ($\frac{a}{2}$, $\frac{a}{2}$ )
• D. None of these

Answer 1

The correct option is D None of these

$\begin{array}{c}i=x\\ i+r=90\\ i=x=45\end{array}$

the coordinates of point $p$ is $(a\cos \theta ,a\sin \theta )$

$(\mathrm{acos}45,a\sin 45)$

$=(\frac{a}{\sqrt{2}},\frac{a}{\sqrt{2}})$

so (D) none of these is right option