A telescope has an objective lens of focal length 150 cm and an eyepiece of focal length 5 cm. If a 50 m tall tower at a distance of 1 km is observed through this telescope in normal setting, the angle formed by the image of the tower is , then is close to : Option 1) Option 2) Option 3) Option 4)

As we learnt in

Magnification from mirror -

- wherein

height of image from principal axis

height of object from principal axis

object distance

image distance

Angular magnification

Correct option is 4.

Option 1)

This is an incorrect option.

Option 2)

This is an incorrect option.

Option 3)

This is an incorrect option.

Option 4)

This is the correct option.

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