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Give Two Reasons to Explain Why Reflecting Telescopes Are Preferred Over Refracting Type. - Physics

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a) Give two reasons to explain why reflecting telescopes are preferred over refracting type.

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Solution

(a) The reflecting telescopes are preferred over refracting type because of the following reasons:
  (i) There is no chromatic aberration in case of reflecting telescopes as the objective is a mirror.
  (ii) Spherical aberration is reduced in case of reflecting telescopes by using mirror objective in the form of a paraboloid.

 

Concept: Ray Optics - Mirror Formula
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