Register to reply

Incoherent EM waves

by rachiebaby17
Tags: em waves, incoherent, intensity, radiation
Share this thread:
Apr29-09, 07:38 PM
P: 7
1. The problem statement, all variables and given/known data

Two incoherent EM waves of intensities 7I0 and 13I0 travel in the same direction in the same region of space. What is the intensity of EM radiation in this region?

2. Relevant equations
3. The attempt at a solution

I have tried using I = I1 + I2 + ( 2* square root of (I1 * I2))
also tried using the same equation with a minus sign in front of the () portion.

I am lost at what I need to do even some hints would be so great!
Phys.Org News Partner Science news on
Hoverbike drone project for air transport takes off
Earlier Stone Age artifacts found in Northern Cape of South Africa
Study reveals new characteristics of complex oxide surfaces
Apr29-09, 09:06 PM
HW Helper
P: 4,439
I have tried using I = I1 + I2 + ( 2* square root of (I1 * I2))
This formula is true only for coherent sources not for incoherent sources.
For incoherent sources you can directly add the intensities.

Register to reply

Related Discussions
Intensity of EM radiation for two incoherent waves? Introductory Physics Homework 0
What are incoherent waves? Classical Physics 4
Incoherent Light Sources General Physics 3
Are World Counts Incoherent? General Discussion 35
Adding intensities for incoherent waves Introductory Physics Homework 1