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a telescope has an objective lens of focal length 200 centimetre and an eyepiece with focal length 2 centimetres. if this telescope is used to see a 50 metre tall building at a distance of 2 kilometre what is the height of image of the building formed by the objective lens

a telescope has an objective lens of focal length 200 centimetre and an eyepiece with focal length 2 centimetres. if this telescope is used to see a 50 metre tall building at a distance of 2 kilometre what is the height of image of the building formed by the objective lens

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Grade:12th pass

2 Answers

sahil
11 Points
6 years ago
angle subtended my the tower at the objective = 50/2000 = 1/40rad
angle subtended by image = h/f(objective)
=h/200
h/200=1/40
h=5cm
Rishi Sharma
askIITians Faculty 646 Points
3 years ago
Dear Student,
Please find below the solution to your problem.

angle subtended my the tower at the objective = 50/2000 = 1/40rad
angle subtended by image = h/f(objective)
=h/200
h/200=1/40
h=5cm

Thanks and Regards

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