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Question
Draw a ray diagram showing the image formation of a distant object by a refracting telescope ?
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Solution
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RELATED QUESTIONS
You are given three lenses of power 0.5 D, 4 D, and 10 D to design a telescope.
1) Which lenses should be used as objective and eyepiece? Justify your answer.
2) Why is the aperture of the objective preferred to be large?
Draw a labelled ray diagram of an image formed by a refracting telescope with the final image formed at infinity. Derive an expression for its magnifying power with the final image at infinity
Draw a labeled ray diagram of a reflecting telescope. Mention its two advantages over the refracting telescope.
The eyepiece of an astronomical telescope has a focal length of 10 cm. The telescope is focussed for normal vision of distant objects when the tube length is 1.0. m. Find the focal length of the objective and the magnifying power of the telescope.
Assertion: An astronomical telescope has an objective lens having large focal length.
Reason: Magnifying power of an astronomical telescope varies directly with focal length of the objective lens.
A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm. The magnifying power of telescope for viewing a distant object?
A telescope in which the eye lens used is concave, so that the final image is erect, is popularly called a:
During the formation of an image in a telescope under normal adjustment, the eyepiece is adjusted so that the intermediate image lies:
Which type of telescope uses a converging lens as eyepiece and gives an inverted image?
Modern telescopes often use a concave mirror rather than a lens for the objective primarily because:
