Question

Plz anyone can say me this answer!​

Answer 1

Answer:

That will also be 60 degree.

Answer 2

Diagram :-

$\setlength{\unitlength}{2mm}\begin{picture}(0,0)\qquad\thicklines\put(0,0){\line(3,0){4cm}}\multiput(0.3,0)(1,0){20}{\line(1,-2){0.2cm}}\qbezier(7,0)(9.4,3)(12,0)\put(5,1){ \sf\footnotesize 60^\circ }\put(9.5,0){\vector(-3,4){1cm}}\put(12,1){ \sf\footnotesize }\end{picture}$

Solution :-

Since the mirror is straight so the total angle on the mirror = 180°

So,

$\boxed{\textbf{\textsf{\small Incident\;ray+reflected\;ray = 180\degree}}}$

$\sf\longmapsto 60^\circ + reflected\;ray = 180^\circ$

$\sf\longmapsto Reflected\;ray=180^\circ-60^\circ$

$\longmapsto \underline{\boxed{\textbf{\textsf{Reflected\;ray=120\degree}}}}$

More information :-

Formulas of Optics ,

• Magnification formula :- $\sf\dfrac{v}{u}$

• $\sf\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}$

• $\sf f = \dfrac{R}{2}$
• $\sf d\sin\theta = m\lambda$
• $\sf n = \dfrac{c}{v}$