Intensity of the electromagnetic wave is about (a) 3 Wm^-2 (b) 4 Wm^-2 (c) 5 Wm^-2 (d) 6 Wm^-2

Name: Problem 55, Chapter 22: Master Resource Book in JEE Main Physics
Uploaded: 2022-01-16T06:05:23-08:00
Duration: 1 min 30 s
Channel: Amita Prajapat
Description: Intensity of the electromagnetic wave is about (a) 3 Wm^-2 (b) 4 Wm^-2 (c) 5 Wm^-2 (d) 6 Wm^-2

step 1 This is the magnetic field for a plain electromagnetic wave given in the question and we are goi

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Intensity of the electromagnetic wave is about (a) $3 \mathrm{Wm}^{-2}$ (b) $4 \mathrm{Wm}^{-2}$ (c) $5 \mathrm{Wm}^{-2}$ (d) $6 \mathrm{Wm}^{-2}$

   Intensity of the electromagnetic wave is about
(a) $3 \mathrm{Wm}^{-2}$
(b) $4 \mathrm{Wm}^{-2}$ (c) $5 \mathrm{Wm}^{-2}$
(d) $6 \mathrm{Wm}^{-2}$

Master Resource Book in JEE Main Physics

D. B. Singh 1st Edition

Chapter 22, Problem 55

Instant Answer

Solved by Expert Amita Prajapat

01/16/2022

Step 1

This can also be expressed as the energy density of the electromagnetic wave multiplied by its velocity. Mathematically, this can be written as: \[I = \frac{P}{A} = u \cdot c\] where $I$ is the intensity, $P$ is the power, $A$ is the area, $u$ is the Show more…

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Intensity of the electromagnetic wave is about (a) $3 \mathrm{Wm}^{-2}$ (b) $4 \mathrm{Wm}^{-2}$ (c) $5 \mathrm{Wm}^{-2}$ (d) $6 \mathrm{Wm}^{-2}$

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Key Concepts

Electromagnetic Wave

An electromagnetic wave is a self-propagating wave consisting of oscillating electric and magnetic fields that travel through space. These waves cover a broad spectrum, including radio waves, microwaves, visible light, and X-rays, and are described by Maxwell's equations.

Intensity

Intensity refers to the power transmitted by an electromagnetic wave per unit area, directed perpendicular to the wave propagation. It quantifies how much energy is delivered over a certain area per unit time and is measured in watts per square meter (W/m²).

Poynting Vector

The Poynting vector is a vector that represents the rate of energy transfer per unit area in an electromagnetic field. It is defined as the cross product of the electric and magnetic fields, providing both the magnitude and the direction of the energy flow.

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