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Optical instruments
Concepts tested here
- Magnifying power and objective focal length
All Questions
2014 AIPMT 1 question
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If the focal length of objective lens is increased then magnifying power of:Microscope: $M = \frac{LD}{f_0f_e} \propto \frac{1}{f_0}$, so it decreases.
Telescope: $M = \frac{f_0}{f_e} \propto f_0$, so it increases.
