1. Tardigrade
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  3. Physics
  4. An electromagnetic wave of intensity 1400 W / m 2 falls on a metal surface of area 1.5 m 2 and is completely absorbed by it. Find out the force (in μ N ) exerted by the beam.

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Q. An electromagnetic wave of intensity $1400\, W / m ^{2}$ falls on a metal surface of area $1.5 \,m ^{2}$ and is completely absorbed by it. Find out the force (in $\mu N$ ) exerted by the beam.

Electromagnetic Waves

Solution:

$F=\frac{I A}{c}=\frac{1400 \times 1.5}{3 \times 10^{8}}$
$=7 \times 10^{-6} N$