CUET · PHYSICS · PYQ PAPER 2023
In a compound microscope the focal length of objective lens and eye lens are 4 em and 10 cm respectively. An object is placed at 6 cm from the objective lens. If the final image is formed at the near point of eye, then the magnifying power of microscope is:
- A 7
- B 25
- C 40
- D 14
Answer & Solution
Correct Answer
(A) 7
Step-by-step Solution
Detailed explanation
\( \frac{1}{v_o} = \frac{1}{f_o} - \frac{1}{u_o} = \frac{1}{4} - \frac{1}{6} = \frac{3-2}{12} = \frac{1}{12} \) \( v_o = 12 \text{ cm} \) \( m_o = \frac{v_o}{u_o} = \frac{12}{6} = 2 \) \( m_e = 1 + \frac{D}{f_e} = 1 + \frac{25}{10} = 1 + 2.5 = 3.5 \)…
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