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Doppler Effect in Light Waves

In a YDSE, ...

Question

In a YDSE, $D = 1 m, d = 1 m m$ and $λ = 1 / 2 m m$ Find the no of maxima and minima obtain on the screen.

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Solution

=> highest order maxima,

$n_{m a x} = \frac{d}{λ} = 2$

and highest order minima $n_{m i n} = \frac{d}{λ} + \frac{1}{2} = 2$

Total number of maxima $= 2 n_{m a x} + 1 = 5$

Total number of minima $= 2 n_{m i n} = 4$

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