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JIPMER 2014
Exam
JIPMER
Year
2014
Subject
Physics
Chapter
Wave Optics

JIPMER 2014 · Physics · Wave Optics

If the sun rays are incidenting at 60^ angle and intensity is I ....

If the sun rays are incidenting at 60∘60^{\circ} angle and intensity is II. If the sun rays are made incident at 30∘30^{\circ} angle, then what will be the intensity?

Options

  1. AI3\frac{I}{\sqrt{3}}
  2. B3I\sqrt{3} I
  3. C3I3I
  4. DI3\frac{I}{3}

Correct answer

B. 3I\sqrt{3} I

Step-by-step solution

Ratio of intensities I1I2=cos⁡θ1cos⁡θ2=cos⁡60∘cos⁡30∘\frac{I_1}{I_2}=\frac{\cos \theta_1}{\cos \theta_2}=\frac{\cos 60^{\circ}}{\cos 30^{\circ}} I2=3I1I_2=\sqrt{3} I_1
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