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PhysicsModern PhysicsAtomic structureMedium2 minPYQ_2006

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The longest wavelength that can be analysed by a sodium chloride crystal of spacing $d = 2.82$ $A^{o}$ in the second order is

Answer:

Solution:

Bragg's condition is $2 dsin θ = n λ$ , for second order $n = 2, sin θ = 1.$ For longest $λ, 2 d = 2 λ$ $\Rightarrow λ = d$

Stream:VITEEESubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: PYQ_2006

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