A luminous object is placed a distance of 30 cm from the convex lens of focal length 20 cm-The distance from the lens a convex mirror of radius of curvature 10 cm should be placed on the other side of the lens such that the real images formed on the itself is30 cm12 cm50 cm60 cm

Question

Toppr Admin · Accepted Answer

For the final image to be formed at the source the image of the image through the lens should form at the central of the mirror-1-x3D1-x2212-1-x2212-30-1201-x3D1-120-x2212-1301-x3D1-10600-x3D1-60cmd-60-x2212-10-50cm

A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm.The distance from the lens a convex mirror of radius of curvature 10 cm should be placed on the other side of the lens such that the real images formed on the source itself is30cm12cm50cm60cm

for the final image to be formed at the source the image of the image through the lens should form at the central of the mirror.1ϑ−1(−30)=1201ϑ=120−1301ϑ=10600ϑ=60cmd=60−10=50cm

for the final image to be formed at the source the image of the image through the lens should form at the central of the mirror.

$\frac{1}{ϑ} - \frac{1}{(- 30)} = \frac{1}{20}$

$\frac{1}{ϑ} = \frac{1}{20} - \frac{1}{30}$

$\frac{1}{ϑ} = \frac{10}{600}$

$ϑ = 60 c m$

$d = 60 - 10 = 50 c m$