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PhysicsModern PhysicsAtomic structureEasy2 minPYQ_2020

PhysicsEasysingle choice

$K_{α}$ wavelength emitted by an atom of atomic number $Z = 11$ is $λ$ . Find the atomic number for an atom that emits $K_{α}$ radiation with wavelength $4 λ$ .

Options:

Answer:

Solution:

$\frac{1}{λ} \propto {(z-1)}^{2}$ $^{}$

$∴ \frac{λ_{1}}{λ_{2}} = \frac{{(z_{2} - 1)}^{2}}{{(z_{1} - 1)}^{2}}$

$\frac{1}{4} = {(\frac{Z_{2} - 1}{11 - 1})}^{2}$

Solving this, we get, $Z_{2} = 6$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: PYQ_2020

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