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Physics - Wave Optics Question with Solution | TestHub

PhysicsWave OpticsYDSEEasy2 minQB

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In young double slit experiment, the wavelength of red light is $7800 Å$ and that of blue light is 5200 $Å$ The value of n for which n^thbright band due to red light coincides with (n + 1)^thbright band due to blue light, is :

Options:

Answer:

Solution:

For bands to coincide

$\frac{n λ_{1} D}{d} = (n + 1) \frac{λ_{2} D}{d}$

$\Rightarrow n 7800 = (n + 1) 5200$

$\Rightarrow 78 n = (n + 1) 52$

$\Rightarrow 26 n = 52$

$\Rightarrow n = 2$

Stream:JEESubject:PhysicsTopic:Wave OpticsSubtopic:YDSE

⏱ 2mℹ️ Source: QB

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