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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 6

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An electron is in an excited state in hydrogen-like atom. It has a total energy of $- 3.4 eV .$ If the kinetic energy of the electron is $E$ and its de-Broglie wavelength is $λ,$ then

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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 8

A beam of ultraviolet light of all wavelengths passes through hydrogen gas at room temperature, in the

x -

direction. Assume that all photons emitted due to electron transition inside the gas emerge in the

y -

direction. Let

A

and

B

denote the lights emerging from the gas in the

x

and

y

directions respectively.

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 9

If radiations of allowed wavelengths from ultraviolet to infrared are passed through hydrogen gas at room temperature, absorption lines will be observed in the

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 10

In the hydrogen atom, if the reference level of potential energy is assumed to be zero at the ground state level, then choose the incorrect statement.

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 13

de-Broglie wavelength of an electron in the

n^{th}

Bohr orbit is

λ_{n}

and the angular momentum is

J_{n},

then

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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