Question

Assertion :A ray of light passes through $(0,0)$ after reflection at the point $P(x,y)$ of any curve becomes parallel to x-axis, the equation of the curve may be a parabola $y^2=2x+1$ Reason: A ray of light parallel to axis after reflection from parabolic mirror always passes through $(0,0)$

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

If the curve is parabola whose equation is $y^2=2x+1$,

The focus of the parabola is $(0,0)$

We know that any ray of light passing through the focus of the parabola becomes paralell to the axis of the parabola after reflection and vice versa.