Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 31

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An electron has an energy of $100 eV$ . What will be its wavelength?

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Important Questions on Dual Nature of Matter and Radiation

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 32

The ratio of wavelength of deuteron and proton accelerated through the same potential difference will be,

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 33

An electron is accelerated from rest between two points

A and B

with the potentials

20 V

and

40 V

respectively. The de-Broglie's wavelength associated with the electron at

B

will be,

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 34

An electron is moving with velocity

6.6 \times 10^{3} m s^{- 1}

. The de-Broglie wavelength associated with the electron is (mass of electron

= 9 \times 10^{- 31} kg

, Planck's constant

= 6.62 \times 10^{- 34} J s

),

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 35

The energy that should be added to an electron to reduce its de-broglie's wavelength from

10^{- 10} m

to

0.5 \times 10^{- 10} m

will be,

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 36

The magnitude of the de-Broglie's wavelength

λ

of an electron

(e)

, a proton

(p)

, a neutron

(n)

and an

α

-particle (

α

), all having the same kinetic energy of

1 MeV

, in the increasing order will follow the sequence,

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 37

The accelerating voltage of an electron gun is

50000 V

. The de-Broglie's wavelength of the electron will be,

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 38

If the mass of neutron,

m_{n} = 1.7 \times 10^{- 27} kg

, then the de Broglie wavelength of neutron of energy

3 eV

is,

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Beta Question Bank for Medical: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise (Conceptual Questions)>Q 39

A proton and an

α

-particle are accelerated through same voltage. The ratio of their de-Broglie wavelength will be,