NEET 2025 — Physics solution

NEET2025Physics

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:

A
$4 p$ and $4 m$
B
$p^{4}$ and $4 m$
C
$4 p$ and $m^{4}$
D
$p^{4}$ and $m^{4}$

Solution

When thin lenses are placed in contact, powers add: $P_{n e t} = P + P + P + P = 4 P$ .

Magnifications multiply: $m_{n e t} = m \times m \times m \times m = m^{4}$ .

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