If a source o...

Question

If a source of light is placed at the focus of a parabola & if the parabola is a reflecting surface, then the ray reflected off the parabola bounces back in a line parallel to the axis of the parabola.
On the basis of above information answer the following question
A ray of light is coming along the line $y = 4$ from the positive direction of $x - a x i s$ & strikes a concave mirror whose intersection with the plane $X O Y$ is a parabola $y^{2} = 16 x$ , then equation of reflected ray is

3 x + 2 y = 16

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4 x + 3 y = 16

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5 x + 4 y = 9

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None of these

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Solution

The correct option is B $4 x + 3 y = 16$

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