Start Free Mock LoginAlready registered? Login here

Physics - EM Waves Question with Solution | TestHub

PhysicsEM WavesElectromagnetic wavesHard2 minPYQ_2020

PhysicsHardsingle choice

Light with an average flux of $20 W {cm}^{- 2}$ falls on a non-reflecting surface at normal incidence having surface area $20 {cm}^{2}$ . The energy received by the surface during time span of $1 \min$ is:NEET 2020 (Phase 1)

Options:

Answer:

Solution:

We know that, $I = \frac{E}{A t}$

$E = I A t$

$\Rightarrow E = \frac{20}{10^{- 4}} \times 20 \times 10^{- 4} \times 60$

$\Rightarrow E = 24 \times 10^{3} J$

Stream:NEETSubject:PhysicsTopic:EM WavesSubtopic:Electromagnetic waves

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...