Question:

The focal length of objective and eye piece of a telescope are $ {{f}_{0}} $ and $ {{f}_{e}} $ respectively. Then its magnification will be:

Updated On: Jul 28, 2022
  • $ {{f}_{0}}+{{f}_{e}} $
  • $ {{f}_{0}}\times {{f}_{e}} $
  • $ \frac{{{f}_{0}}}{{{f}_{e}}} $
  • $ \frac{{{f}_{e}}}{{{f}_{0}}} $
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The Correct Option is C

Solution and Explanation

Magnifying power of telescope for relaxed eye $M=-\frac{f_{o}}{f_{e}}=\frac{f_{o}}{f_{e}} $ (numerically)
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Concepts Used:

Single Slit Diffraction

In the single-slit diffraction experiment, we can examine the bending phenomenon of light or diffraction that causes light from a coherent source to hinder itself and produce an extraordinary pattern on the screen called the diffraction pattern.

Single Slit Diffraction
The path difference exhibited by the top two rays

 

 

 

Read More: Difference Between Diffraction and Interference

Central Maximum

Central Maximum