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A microscope has an objective of focal length 2 cm , eyepiece of focal length 4 cm and the tube length of 40 cm . If the distance of distinct vision of eye is 25 cm , the magnification in the microscope is :

Options

  1. A100
  2. B125
  3. C150
  4. D250

Correct answer

B. 125

Step-by-step solution

array ll f ₀=2 ~cm & f _e=4 ~cm ~L =40 ~cm & D =25 ~cm array In the condition of normal adjustment. aligned m & = L f ₀ D f _e & = 40 2 25 4 & =125 aligned

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