First slide

Coherent sources and their importance in interference

Question

The Young’s double slit experiment is performed with blue and with green light of wavelengths 4360 $\overset{0}{A}$ and 5460 $\overset{0}{A}$ respectively. If x is the distance of 4th maximum from the central one, then

Moderate

A

$x (b l u e) = x (g r e e n)$
B

$x (b l u e) > x (g r e e n)$
C

$x (b l u e) < x (g r e e n)$
D

$\frac{x (b l u e)}{x (g r e e n)} = \frac{5460}{4360}$

Solution

$D i s \tan c e o f n t h m a x i m a, x = n λ \frac{D}{d} ∴ x \propto λ A s λ_{b} < λ_{g} ∴ x_{b l u e} < x_{g r e e n}$

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