Last Updated On [03-11-2023]
A Plano-convex lens (focal length f2, refractive index 
2, radius of curvature R) fits exactly into a Plano-concave lens (focal length f1, refractive index 
1, radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be :
(a)
f1 − f2
(b)
f1 + f2
(c)
(d)
A Plano-convex lens (focal length f2, refractive index 2, radius of curvature R) fits exactly into a Plano-concave lens (focal length f1, refractive index 1, radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be :
(a)
f1 − f2
(b)
f1 + f2
(c)
(d)
Question ID - 50829 :-
A Plano-convex lens (focal length f2, refractive index 2, radius of curvature R) fits exactly into a Plano-concave lens (focal length f1, refractive index 1, radius of curvature R). Their plane surfaces are parallel to each other. Then, the focal length of the combination will be :
(a)
f1 − f2
(b)
f1 + f2
(c)
(d)
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A Plano-convex lens (focal length f2, refractive index |
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|
(a) |
f1 − f2 |
(b) |
f1 + f2 |
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(c) |
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(d) |
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The bodies of masses |
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