ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 9

HARD

12th ICSE

IMPORTANT

Earn 100

A proton and an alpha particle have been accelerated through the same potential difference. Compute the ratio of their de-Broglie wavelengths.

Important Questions on Matter Waves

EASY

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 10

Describe in brief what is observed when moving electrons are allowed to fall on a thin graphite film and the emergent beam falls on a fluorescent screen.

EASY

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 1

What is de-Broglie hypothesis?

EASY

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 1

What conclusion can be drawn from Davisson and German's experiment?

MEDIUM

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 2

Show that the de-Broglie wavelength of electron of energy

K

is given by

λ = \frac{h}{\sqrt{2 m K}}

.

MEDIUM

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 3

Show that the de-Broglie wavelength of electrons accelerated through a potential of

V

volt is given by

λ = \frac{h}{\sqrt{2 m e V}}

.

MEDIUM

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IMPORTANT

ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 1

What do you understand by wave particle duality for electromagnetic radiation.

MEDIUM

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 2

Explain Davisson and Germer's experiment to show the wave nature of fast moving electrons by using the relation

λ = \sqrt{\frac{150}{V}} \overset{o}{A}

, where

λ

is wavelength and

V

is accelerating voltage.

EASY

12th ICSE

IMPORTANT

ISC Physics Class 12, Part-2>Chapter 11 - Matter Waves>QUESTIONS>Q 1

What is de-Broglie wavelength of a

2 kg

object moving at a speed of

1 {ms}^{- 1}

?