Question 5: Ray Optics

Question

In the given figure, the angle of reflection is

Accepted Answer

$\begin{aligned}
& 	ext { Given, } y=x^2 \\
& \qquad \frac{d y}{d x}=2 x=2 	imes \frac{1}{2}=1 \\
& \Rightarrow 	an 	heta=1=m \\
& \Rightarrow \quad 	heta=45^{\circ}
\end{aligned}$
The slope of normal at $B$
$\begin{aligned}
m_2 & =-\frac{1}{m_1}=-\frac{1}{1}=-1 \\
\Rightarrow \quad 	heta & =-45^{\circ}
\end{aligned}$
From the figure angle of incidence is $45^{\circ}$. Hence, angle of reflection is $45^{\circ}$

Answer

30$^\circ$

Answer

60$^\circ$

Answer

45$^\circ$

Answer

None of these

Ray Optics

In the given figure, the angle of reflection is

Choose the correct answer: