Ask Questions, Get Answers

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

A layer of oil 3 cm thick is floating on a layer of colored water 5 cm thick refractive index of colored water is $\large\frac{5}{3}$ and apparent depth of two liquids appears to be $\large\frac{36}{7}$cm. Then refractive index of oil:

$(a)\;1.2 \\ (b)\;1.6 \\ (c)\;1.4 \\ (d)\;1.8 $

Can you answer this question?

1 Answer

0 votes
Apparent depth $=\large\frac{t_1}{\mu_1}+\frac{t_2}{\mu_2}$
$\therefore \large\frac{36}{7}=\frac{5}{\Large\frac{5}{3}}+\frac{3}{\mu_2}$
$\large \frac{3}{\mu_2}=\frac{36}{7}$$-3 =\large \frac{15}{7}$
$\therefore \mu_2=\large\frac{7}{5}$$=1.4$
Hence c 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