Telescope has an objective of focal length $100 \mathrm{~cm}$ and an eyepiece of focal length $5…

Telescope has an objective of focal length $100 \mathrm{~cm}$ and an eyepiece of focal length $5 \mathrm{~cm}$. The least distance of distinct vision is $25 \mathrm{~cm}$. The telescope is focussed for distinct vision on a scale $3 \mathrm{~m}$ away from the objective. The magnification produced is ____
  1. $-3$
  2. $1.5$
  3. $-5$
  4. $5$

Solution

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Asked in: AP EAMCET 2017 (24 Apr Shift 2)

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