1. Tardigrade
  2. Question
  3. Physics
  4. Light from a point source in air falls on a convex spherical glass surface (μ=1.5 and radius of curvature =20 cm ). The distance of the light source from the glass surface is 100 cm. At what position the image is formed?

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Light from a point source in air falls on a convex spherical glass surface $(\mu=1.5$ and radius of curvature $=20 \,cm$ ). The distance of the light source from the glass surface is $100 cm$. At what position the image is formed?

Ray Optics and Optical Instruments

Solution:

$\frac{\mu_{2}}{v}-\frac{\mu_{1}}{u}=\frac{\mu_{2}-\mu_{1}}{R}$
$\Rightarrow \frac{1.5}{v}-\frac{1}{(-100)}=\frac{1.5-1}{(+20)}$
$\Rightarrow v=+100 cm$
The image is formed at a distance of $100\, cm$ from the glass surface in the direction of incident light.