A bi-convex lens made of glass (refractive index 1.5) is put in a liquid of refractive index 1.7. Its focal length will |
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a) |
Decrease and change sign |
b) |
Increase and change sign |
c) |
Decrease and remain of the same sign |
d) |
Increase and remain of the same sign |
A bi-convex lens made of glass (refractive index 1.5) is put in a liquid of refractive index 1.7. Its focal length will |
|||
a) |
Decrease and change sign |
b) |
Increase and change sign |
c) |
Decrease and remain of the same sign |
d) |
Increase and remain of the same sign |