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JEE Main 202127 AugustEvening Shift
Exam
JEE Main
Year
2021
Date
27 August
Shift
Evening Shift
Subject
Physics
Chapter
Wave Optics

JEE Main 2021 · 27 August · Evening Shift · Physics · Wave Optics

The light waves from two coherent sources have same intensity I _ 1...

The light waves from two coherent sources have same intensity I1=I2=I0.{I}_{1} = {I}_{2} = {I}_{0} . In interference pattern the intensity of light at minima is zero. What will be the intensity of light at maxima?

Options

  1. AI0{I}_{0}
  2. B2I02{I}_{0}
  3. C4I04{I}_{0}
  4. D5I05{I}_{0}

Correct answer

C. 4I04{I}_{0}

Step-by-step solution

Iminimum=0{I}_{minimum} = 0

(I1−I2)2=0{\left(\sqrt{{I}_{1}} - \sqrt{{I}_{2}}\right)}^{2} = 0

⇒I1=I2⇒ {I}_{1} = {I}_{2}

{I}_\max = {\left(\sqrt{{I}_{1}} + \sqrt{{I}_{2}}\right)}^{2} = 4{I}_{0}

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