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Wave Optics

Question

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Draw a ray diagram of an astronomical telescope in the near point adjustment. Write down expression for its magnifying power.

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Solution

The figure below shows the ray diagram of an astronomical telescope in the near point adjustment.

Magnifying power is given as,
$m = \frac{F_{0}}{F_{e}} (1 + \frac{F_{e}}{D})$

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Wave Optics

Draw a ray diagram of an astronomical telescope in the near point adjustment. Write down expression for its magnifying power.

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