1.

The focal length of a converging lens is measured for violet, green and red colours. If is f_(v), f_(G) and f_(R) respectively. We will get

Answer»

`f_(v) = f_(G)`
`f_(G) = f_(R)`
`f_(v) lt f_(R)`
`f_(v) GT f_(R)`

Solution :`(1)/(f)=(mu-1)((1)/(R_(1))-(1)/(R_(2)))i.e.fprop(1)/(mu-1)`


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