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Questions
Draw a ray diagram of astronomical telescope for the final image formed at infinity.
Draw a labelled diagram of an astronomical telescope when its final image lies at infinity.
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Solution
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| A number of optical devices and instruments have been designed and developed such as periscope, binoculars, microscopes and telescopes utilising the reflecting and refracting properties of mirrors, lenses and prisms. Most of them are in common use. Our knowledge about the formation of images by the mirrors and lenses is the basic requirement for understanding the working of these devices. |
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OR
Write two distinct advantages of a reflecting type telescope over a refracting type telescope.
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