Ratio of amplitudes of the waves coming

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Target Exam

CUET

Subject

Physics

Chapter

Wave Optics

Question:

Ratio of amplitudes of the waves coming from two slits having widths in the ratio 4 : 1 will be

Options:

1 : 2

2 : 1

1 : 4

4 : 1

Correct Answer:

2 : 1

Explanation:

Intensity ∝ slit width

$\frac{I_1}{I_2}=\frac{4}{1}$

$\frac{a_1}{a_2}=\sqrt{\frac{I_1}{I_2}}=\sqrt{4}=2:1$

$\frac{a_1}{a_2}=2:1$