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CBSE Class 10 Answered

Two mirror one concave of radius of curvature 0.4m and another convex mirror of radius of curvature 0.2m are kept facing each other which are 0.5m apart. An object is placed between two mirrors, 0.25m from concave mirror. Where is the image formed after two reflections.
Asked by rushabhjain.avv | 22 Mar, 2019, 09:20: PM
answered-by-expert Expert Answer

The first reflection at concave mirror.

u=−0.25m

f=r/2=−0.2m

1/f=1/u+1/v

−1/0.2=−1/0.25+1/v

v=−1m

i.e. the image forms 1 m in front of the concave mirror ie 0.5 m behind convex mirror.(virtual image ) for reflection at convex mirror

u=+0.5

f=r/2=+0.1

∴u=1/0.1=1/0.5+1/v

v=+0.125m

ie 0.125 behind convex mirror

Answered by Shiwani Sawant | 23 Mar, 2019, 05:35: PM

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