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Physics · PYQ NEET UG 2025

हिन्दी

In a certain camera, a combination of four similar thin convex lenses are arranged axially in contact. Then the power of the combination and the total magnification in comparison to the power (\( p \)) and magnification (\( m \)) for each lens will be, respectively -

  1. \( 4p\text{ and }4m \)
  2. \( p^4\text{ and }4m \)
  3. \( 4p\text{ and }m^4 \)
  4. \( p^4\text{ and }m^4 \)

Correct answer · Option 3

\( 4p\text{ and }m^4 \)

Explanation

Power of lenses in contact adds up: \( P = p + p + p + p = 4p \). Magnification of lenses in contact multiplies: \( M = m \times m \times m \times m = m^4 \).

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