Wavelength of ligh used in an optical in...

Wavelength of ligh used in an optical instrument are `lamda_`=4000A` and `lamda_2=5000A` , then ratio of their respective resolving powers (corresponding to `lamda_1` and `lamda_2`)

`16:25`

`9:1`

`4:5`

`5:4`

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The correct Answer is:

`(R.P)_1/((R.P)_2)=(lamda_2)/(lamda_1)=(5)/(4)`

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