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Important Questions on Atomic Physics

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 15

In a hydrogen atom, the electron is in

n^{th}

excited state. It may come down to second excited state by emitting ten different wavelengths. What is the value of

n

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 16

An electron in hydrogen atom after absorbing energy photons can jump between energy states

n_{1}

and

n_{2} (n_{2} > n_{1}) .

Then it may return to ground state after emitting six different wavelengths in emission spectrum. The energy of emitted photons is either equal to, less than or greater than the absorbed photons. Then

n_{1}

and

n_{2}

are :-

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 17

The electron in a hydrogen atom makes transition from $M$ shell to $L$. The ratio of magnitudes of initial to final centripetal acceleration of the electron is :-

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 18

The electron in a hydrogen atom makes a transition

n_{1} \to n_{2}

, where

n_{1}

and

n_{2}

are the principal quantum numbers of the two states. Assume the Bohr model as valid in this ease. The frequency of the orbital motion of the electron in the initial state is

\frac{1}{27}

of that in the final state. The possible values of

n_{1}

and

n_{2}

are

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 19

Monochromatic radiation of wavelength

λ

is incident on a hydrogen sample containing in ground state. Hydrogen atoms absorb the light and subsequently emit radiations of ten different wavelengths. The value of

λ

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 20

An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding electron loses all its kinetic energy. Consequently, the hydrogen atom may emit a photon corresponding to the largest wavelength of the Balmer series. The kinetic energy of the colliding electron is given by

\frac{24.2}{N} eV

. Find the value of

N

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 21

In an atom, two electrons move around the nucleus in circular orbits of radii

R

and

4 R .

The ratio of the time taken by them to complete one revolution is (neg.'ect electric interaction) :-

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 22

The electron in hydrogen atom in a sample is in

n^{t h}

excited state, then the number of different spectrum lines obtained in its emission spectrum will be

In Hydrogen and Hydrogen like atoms, the ratio of difference of energies E2n-En and E2nEn, varies with its atomic number z and n as-

Important Questions on Atomic Physics

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In Hydrogen and Hydrogen like atoms, the ratio of difference of energies $E_{2 n} - E_{n}$ and $E_{2 n} E_{n,}$ varies with its atomic number $z$ and $n$ as-