First slide

The optical instruments

Question

Four convergent lenses have focal lengths 100 cm, 10 cm, 4 cm and 0.3 cm. For a telescope with maximum possible magnification, we choose the lenses of focal length

Moderate

A

100 cm, 0.3 cm
B

10 cm, 0.3 cm
C

10 cm, 4 cm
D

100 cm, 4 cm

Solution

$m = - \frac{f_{0}}{f_{e}}$

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