Question

The size of image of O by M₂ is twice of image of O by M₁ and both images coincide. Find the distance of M₁ form the pole of M₂ –

• A. 30 cm
• B. 60 cm
• C. 45 cm
• D. 40 cm

Answer 1

Answer: (C)

45 cm

Answer 2

m = 2 Ž u = $\frac { 3 \mathrm { f } } { 2 }$ & M₁ is in between O & its image so distance between then is = $\frac { 3 \mathrm { f } } { 2 }$+ $\frac { 3 \mathrm { f } } { 4 }$