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Combination of two convex lenses works a...

Combination of two convex lenses works always as .......

A

concave lens

B

convex lens

C

rectangular glass slab

D

plane mirror

Text Solution

Verified by Experts

The correct Answer is:
B, C
Equivalent focal length of combination,
In `f=(f_1f_2)/(f_1+f_2)` for concave lens.
`f=((f_1)(f_2))/(f_1+f_2)`
`therefore f=`positive `therefore` Works as convex lens.
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