Ratio of amplitudes of the waves coming from two slits having widths in the ratio 4 : 1 will be
Answer & explanation
Correct answer: option 2
Intensity ∝ slit width
$\frac{I_1}{I_2}=\frac{4}{1}$
$\frac{a_1}{a_2}=\sqrt{\frac{I_1}{I_2}}=\sqrt{4}=2:1$
$\frac{a_1}{a_2}=2:1$