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A giant refracting telescope at an obser...

A giant refracting telescope at an observatory has an objective lens of focal length` 15cm`.If an eye piece of focal length `1.0cm` is used What is the angular magnification of the telescope ?

Text Solution

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(a) Microwave, (b) Infrared, (c) X-rays
Microwave are produced by special vacuum tubes, like klystorms, magnetrons and gunn diodes.
Infrared are produced by the vibrating molecules and atoms in hot bodies.
X-rays are produced by the bombardment of high energy electrons on a metal target of high atomic weight (like tungston).
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