1. Tardigrade
  2. Question
  3. Physics
  4. What is the intensity ratio of the used light sources if intensity ratio of the maxima and minima in an interference pattern produced by these sources is 9:1

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. What is the intensity ratio of the used light sources if intensity ratio of the maxima and minima in an interference pattern produced by these sources is $9:1$

NTA AbhyasNTA Abhyas 2020

Solution:

$\frac{I_{m a x}}{I_{m a x}}=\frac{\left(A + B\right)^{2}}{\left(A - b\right)^{2}}$
$\therefore \frac{9}{1}=\frac{\left(A + B\right)^{2}}{\left(A + B\right)^{2}}or\frac{3}{1}=\frac{A + B}{A - B}$
Or $2A=4B\Longrightarrow \frac{A}{B}=2$
$\therefore \frac{I_{1}}{I_{2}}=\frac{A^{2}}{B^{2}}=\frac{4}{1}$