a convax lens of focal length 12cm is madeof glass u=3/2 what will be its focal length when immersed in liquid of u=5/4

a convax lens of focal length 12cm is madeof glass u=3/2 what will be

1.	a convax lens of focal length 12cm is madeof glass u=3/2 what will be its focal length when immersed in liquid of u=5/4
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