Question

From a point source a light falls on a spherical glass surface (radius of curvature =10 cm). The distance between point source and glass surface is 50cm. The position of image is :

• A. 25 cm
• B. 50 cm
• C. 100 cm
• D. 150 cm

Answer 1

Answer: (B)

50 cm

Answer 2

: Using, $\frac { \mu _ { 2 } } { \mathrm { v } } - \frac { \mu _ { 1 } } { \mathrm { u } } = \frac { \mu _ { 2 } - \mu _ { 1 } } { \mathrm { R } }$

Here, $\mu _ { 1 } = 1 , \mu _ { 2 } = 1.5 , u = - 50 \mathrm {~cm}$

$\Rightarrow \mathrm { v } = 50 \mathrm {~cm}$