1.

  The ratio of the focal length of the objective to the focal length of the eyepiece is greater than one for      [NDA]

A. a microscope
B. a telescope
C. \[{{I}_{rms}}=\frac{1}{\pi }{{I}_{0}}\] 
D. neither microscope nor telescope
Answer» C. \[{{I}_{rms}}=\frac{1}{\pi }{{I}_{0}}\] 


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