Question

A light ray travels from medium 1 to medium 2 as shown in figure. The value of $\mu$, (refractive index of medium -1 ) will be :

• A. $\sqrt{3}$
• B. $3\sqrt{3}$
• C. $\frac{4}{3\sqrt{3}}$
• D. $\frac{8}{3}$

Answer 1

The correct option is C $\frac{4}{3\sqrt{3}}$

$y=4(\sin 5\pi t+\sqrt{2}\cos 5\pi t)$

$=4\sin 5\pi t+4\sqrt{2}\cos 5\pi t$

$y{=}^{\prime }A\sin \omega t+B\cos \omega t$

Amplitude net $=\sqrt{A^2+B^2}$

$=\sqrt{(4{)}^2+(4\sqrt{2}{)}^2}$

$=4\sqrt{3}$.

Option C.