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Thin convex and concave lenses of same material are combined together. A parallel beam of ray passes through the combination.Draw ray diagram for the following set of focal lengths. Note down the position and nature of the images convex lens concave length 20 cm 10cm 20 cm 20 cm 20 cm 30 cm

Thin convex and concave lenses of same material are combined together. A parallel beam of ray passes through the combination.Draw ray diagram for the following set of focal lengths. Note down the position and nature of the images
convex lens concave length
20 cm 10cm
20 cm 20 cm
20 cm 30 cm

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1 Answers

harini desiraju
31 Points
13 years ago

when concave n convex lenses are combined,the system acts as spherical glass slab,i.e curved glass slab. now u can easily proceed,by using the formulae related to refraction at curved surfaces

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