Practicing Success
A light source is kept in air $(n \approx 1)$ at a distance of 200 cm from a convex spherical glass surface $\left(n=\frac{3}{2}\right)$ such that light falls on it. If the radius of curvature of the surface is 40 cm, the position of the image is at |
–100 cm –200 cm +200 cm +100 cm |
+200 cm |
The correct answer is Option (3) → +200 cm $\mu_2=\frac{3}{2}, \mu=1$ R = 40 cm u = -200 cm $\frac{\mu_2}{v}-\frac{\mu_1}{u}=\frac{\mu_2-\mu_1}{R}$ $\frac{1.5}{v}+\frac{1}{200}=\frac{1.5-1}{40}$ $\frac{1.5}{v}=\frac{5}{400}-\frac{1}{200}$ v = 200 cm |