An astronomical refractive telescope has an objective of focal length 20 m and an…
Physics · Class 12 · CBSE — Ray Optics & Optical Instruments
An astronomical refractive telescope has an objective of focal length 20 m and an eyepiece of focal length 2 cm. Then
- the magnification is 1000.
- the length of the telescope tube is 20.02 m
- the image formed is inverted
- all of these
Answer
(D) all of these
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