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The diameter of the moon is 3.5 xx 10^(3...

The diameter of the moon is `3.5 xx 10^(3) km` and its distance from the earth is `3.8 xx 10^(5)km`. It is seen through a telescope having focal lengths of objective and eye-piece as `4m` and `10 cm` respectively. Calculate (a) magnifying power of telescope (b) length of telescope tube and (c) anngular size of image of moon.

A

`15^(@)`

B

`20^(@)`

C

`30^(@)`

D

`35^(@)`

Text Solution

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The correct Answer is:
b
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