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A simple telescope consisting of an obje...

A simple telescope consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focused on a distant object in such a way that parallel rays emerge from eye lens. If the object subtends an angle of `2^(@)` at the objective, the angular width of the image is (Let `tan theta=theta` assuming `theta` small).

A

`10^(@)`

B

`24^(@)`

C

`50^(@)`

D

`1//6^(@)`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

    A
    real, at 30 cm in front of the mirror
    B
    real, at 30 cm behind the mirror
    C
    real, at 10 cm in front of the mirror
    D
    virtual, at 10 cm behind the mirror

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    A
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    B
    `1.38 cm`
    C
    `1.0 m`
    D
    `1.5 m`