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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsAtomic structureEasy2 minPYQ_2020

PhysicsEasysingle choice

When an electron jumps from higher orbit to the second orbit in ${He}^{+}$ ion, the radiation emitted out will be in $(R = 1.09 \times 10^{7} m^{- 1})$

Options:

Answer:

Solution:

$\frac{1}{λ} = R Z^{2} (\frac{1}{n_{1}^{2}} - \frac{1}{n_{2}^{2}})$

For $λ_{m a x'} n_{1} = 2 then n_{2} = 3$

$∴ \frac{1}{λ_{m a x}} = 1.09 \times 10^{7} \times 2^{2} (\frac{1}{2^{2}} - \frac{1}{3^{2}})$

$∴ λ_{m a x} = 165 nm$ (The region is visible)

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: PYQ_2020

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