With the help of a ray diagram explain the working of a reflecting telescope. Mention two advantages of a reflecting telescope over a refracting telescope.

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TextReflecting Telescope and Its AdvantagesCBSE PYQ

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Why is a reflecting telescope preferred over a refracting telescope ? Justify your answer giving two reasons.

TextReflecting Telescope and Its Advantages

A Cassegrain telescope uses two mirrors as shown in Fig. 9.26. Such a telescope is built with the mirrors 20mm apart. If the radius of curvature of the large mirror is 220mm and the small mirror is 140mm, where will the final image of an object at infinity be?

TextReflecting Telescope and Its Advantages