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Astronomical telescope has a small eye piece and a large objective lens. Whereas a compound microscope has a large eye piece and small objective lens. Therefore can we use astronomical telescope as compound microscope by viewing it from objective lens?


marked as duplicate by M. Enns, Jon Custer, John Rennie, stafusa, ZeroTheHero Jan 11 at 8:20

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    $\begingroup$ Possible duplicate: physics.stackexchange.com/questions/74128/… (the answer there notes that a telescope is optimised for magnifying far away objects whilst microscopes are optimised for nearby ones). $\endgroup$ – jacob1729 Jan 10 at 10:16
  • $\begingroup$ So can we use it as least efficient microscope $\endgroup$ – Naga Sandesh Goli Jan 10 at 10:26
  • $\begingroup$ Ya, I understood that microscope increases the size of the object to view it clearly, whereas telescope brings the object closer as image to view it clearly. $\endgroup$ – Naga Sandesh Goli Jan 10 at 11:09
  • $\begingroup$ Ok! I understood. $\endgroup$ – Naga Sandesh Goli Jan 10 at 12:50
  • $\begingroup$ Ok! I understood. $\endgroup$ – Naga Sandesh Goli Jan 11 at 6:31

Telescopes are usually not build with magnification in mind. It is rather having the highest possible angular resolution! You want to be able to distinguish two spot-like light sources close to each other, not to see them as large as possible but smeary. Therefore, you want to have your telescope dish as large as possible. I think you just have another purpose than with an enlarging microscope...

Or was your question rather theoretically?

  • $\begingroup$ Ok! I understood. $\endgroup$ – Naga Sandesh Goli Jan 10 at 13:51
  • $\begingroup$ Yes my question is theoretical. $\endgroup$ – Naga Sandesh Goli Jan 10 at 13:52

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