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Image Formation by Convex Lens

a telescope h...

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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 dis†an ce of 2 kilometre what is the height of image of the building formed by the objective lens

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Q. A telescope has an objective lens of focal length

200 c m

and an eyepiece with focal length

2 c m

. It is used to see a

50 m

tall building at a distance of

2 k m

. What is the height of the image of building formed by the objective lens?

Q. A telescope has an objective lens of focal length 200 cm and an eye piece with focal.length 2 cm. If this telescope is used to see a 50 metre tall building at a distance of 2 km, what is the height of the image of the building formed by the objective lens?

Q. A Galilean telescope has an objective lens of focal length

50 cm

and eyepiece of focal length

5 cm

. If the telescope is used to focus an object

2 m

away from the objective lens, what should be the tube length? (Final image is forming at infinity.)

Q. A small telescope has an objective lens of focal length

150 c m

and eyepiece of focal length

5 c m

. What is the magnifying power of the telescope for viewing distant objects in normal adjustment?
If this telescope is used to view a

100 m

3

km away, what is the height of the image of the tower formed by the objective lens?

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