Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 5

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An electron in hydrogen atom first jumps from second excited state to first excited state and then, from first excited state to ground state. Let the ratio of wavelength, momentum and energy of photons in the two cases be $x, y$ and $z,$ then select the wrong answer/(s)

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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 6

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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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 7

A particular hydrogen like atom has its ground state binding energy

122.4 eV .

It is in ground state. Then

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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 11

The energy levels of a hypothetical one electron atom are shown in the figure

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Beta Question Bank for Engineering: Physics>Chapter 33 - Atomic Physics>Exercise-2>Q 12

A neutron collides head-on with a stationary hydrogen atom in ground state. Which of the following statements are correct (Assume that the hydrogen atom and neutron has same mass)

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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