A thin lens of glass of focal length +10 cm is immersed in water The new focal length is |
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a) |
20 cm |
b) |
40 cm |
c) |
48 cm |
d) |
12 cm |
A thin lens of glass of focal length +10 cm is immersed in water The new focal length is |
|||||||
a) |
20 cm |
b) |
40 cm |
c) |
48 cm |
d) |
12 cm |