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An objective of a telescope has diameter...

An objective of a telescope has diameter 250 cm. The limit of resolution of telescope for wavelength 600 nm is nearly

A

A. `2.0*10^-7 rad`

B

B. `2.9*10^-7 rad`

C

C. `4.0*10^-7 rad`

D

D. `2.9*10^-8`

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