Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

Find speed of light in medium 'a' if speed of light in medium 'b' is $\large\frac{c}{3}$ where $c=$ Speed of light in vaccum and light refracts from medium 'a' to medium 'b' making $45^{\circ}$ and $60^{\circ}$ respective with normal.

$(a)\;Va= \frac{\sqrt 2}{\sqrt 3}C \\ (b)\;Va= \frac{\sqrt 2}{3 \sqrt 3}C \\ (c)\;Va= \frac{3 \sqrt 2}{\sqrt 3}C \\ (d)\; Va=\sqrt {\frac{3}{2}}C $

Can you answer this question?

1 Answer

0 votes
By Snell's law
$\mu_a \sin \theta_a = \mu b \sin \theta_b$
$\large\frac{c}{V_a}$$ \sin \theta_a=\large\frac{C}{Vp} $$ \sin \theta_b$
$\large\frac{C}{V_a} $$ \sin 45^{\circ}=\large\frac{c}{c/3} $$\sin 60^{\circ}$
$ Va= \large\frac{\sqrt 2}{3 \sqrt 3}$$C$
Hence b is the correct answer.
answered Feb 11, 2014 by meena.p

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App