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The ratio of resolving powers of an opti...

The ratio of resolving powers of an optical microscope for two wavelengths
`lamda_(1) =4000` `Å and lamda_(2)=6000 Å is`

A

`9: 4`

B

`3 : 2`

C

` 16 : 81`

D

`8 : 27`

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The correct Answer is:
B
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