First slide

The optical instruments

Question

On which of the following does the magnifying power of a telescope depends

Moderate

A

The focal length of the objective only
B

The diameter of aperture of the objective only
C

The focal length of the objective and that of the eye piece
D

The diameter of aperture of the objective and that of the eye piece

Solution

$m = \frac{f_{o}}{f_{e}} (1 + \frac{f_{e}}{D})$

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