A plano convex lens of refractive index μ₁... | Ray Optics

JEE Main 2019

10-01-2019 S1

Question

A plano convex lens of refractive index $\mu_1$ and focal length $f_1$ is kept in contact with another plano concave lens of refractive index $\mu_2$ and focal length $f_2$. If the radius of curvature of their spherical faces is $R$ each and $f_1 =2 f_2$, then $\mu_1$ and $\mu_2$ are related as

Select the correct option:

$2 \mu_1-\mu_2=1$

$3 \mu_2-2 \mu_1=1$

$2 \mu_2-\mu_1=1$

$\mu_1+\mu_2=3$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution