what do you mean by penetrating power of optical instruments?
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The penetrating power of alpha rays, beta rays, and gamma rays varies greatly. Alpha particles can be blocked by a few pieces of paper. Beta particles pass through paper but are stopped by aluminum foil. Gamma rays are the most difficult to stop and require concrete, lead, or other heavy shielding to block them
rohitakash:
but what is the penetrating power of optical instruments?
only optical instruments it was? pls try once more
sorry bro i have answered wrong
On the Power of Penetrating into Space by Telescopes; With a Comparative Determination of the Extent of That Power in Natural Vision, and in Telescopes of Various Sizes and Constructions; Illustrated by Select Observations. By William Herschel, LL.D. F. R. S.
it's 2 marks can you pls bro little bit prominian?
that was telescope yr
Ok thanks
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