Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 35

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IMPORTANT

Earn 100

The de Broglie wavelength of a particle of kinetic energy $K$ is $λ$ . If it's kinetic energy becomes $\frac{K}{4}$ , the new de Broglie wavelength of the particle will be:

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Important Questions on DUAL NATURE OF RADIATION AND MATTER

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 36

The de Broglie wavelength associated with a ball of mass

150 g

travelling at

30 m s^{- 1}

is___

(h = 6.6 \times 10^{- 34} J s)

MEDIUM

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 37

A proton and an

α -

particle are accelerated through the same potential difference. The ratio of de Broglie wavelength

λ_{p}

to that of

λ_{α}

is

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 38

The de Broglie wavelength of an electron with kinetic energy

120 e V

is: (Given

h = 6 .63 \times 10^{- 34} J s, m_{e} = 9 \times 10^{- 31} kg, 1 eV = 1 .6 \times 10^{- 19} J

)

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IMPORTANT

Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 39

When the velocity of an electron increases, it's de Broglie wavelength:

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 40

If

m

is mass of an electron and

c

is the speed of light, the ratio of the wavelength of a photon of energy

E

to that of the electron of the same energy is

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 41

A particle is moving three times as fast as an electron. The ratio of the de Broglie wavelength of the particle to that of the electron is

1.813 \times 10^{- 4}

. The mass of the particle is:

(m_{e} = 9 .1 \times 10^{- 31} kg)

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 42

If the de Broglie wavelength of a particle of mass

m

is

100

times its velocity, then its value in terms of its mass (

m

) and Planck's constant (

h

) is

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Physics Crash Course (Based on Revised Syllabus - 2023)>Chapter 11 - DUAL NATURE OF RADIATION AND MATTER>Exercise>Q 43

An electron and a photon each have a wavelength of 1.00 nm. Find their momenta.