are electromagnetic waves in nature

always travel with the speed of light

What is the de Broglie wavelength of a ball of mass 0 . 060 Kg moving at a speed of 1 . 0 m / s ?

The mass of ball is, m = 0.060 kg The speed of ball is, v = 1 . 0 m / s The Plank’s constant is, h = 6 . 6 × 1 0 - 34 Js . The de Broglie wavelength of the ball is, λ = h p . So, λ = h m v = 6 . 6 × 10 − 34 ( 0 . 060 ) ( 1 ) = 1 . 1 × 10 − 32 m . Therefore, the de Broglie's wavelength of this ball is 1 . 1 × 10 − 32 m . Here, the symbols have their usual meaning.

E M B I B E

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 7 - Dual Nature of Radiation and Matter>Exercise>Q 1

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12th Tamil Nadu Board

IMPORTANT

Earn 100

A photocell is illuminated by a small bright source placed $1 m$ away. When the same source of light is placed $2 m$ away, the number of electrons emitted by photo cathode are reduced by a factor of

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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 7 - Dual Nature of Radiation and Matter>Exercise>Q 2

Suppose a beam of electrons with each electron having energy

E_{0}

incident on a metal surface kept in an evacuated chamber. Then

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12th Tamil Nadu Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 7 - Dual Nature of Radiation and Matter>Exercise>Q 4

Light is a form of energy which travels as

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12th Tamil Nadu Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 7 - Dual Nature of Radiation and Matter>Exercise>Q 5

If the energy of a non-relativistic free electron is doubled, the frequency of the matter wave associated with it will be changed by which factor?

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12th Tamil Nadu Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 7 - Dual Nature of Radiation and Matter>Exercise>Q 7

A Photon of energy

40 eV

is incident on a metal surface. Due to this an electron having kinetic energy

37.5 eV

is emitted. The work function of metal surface is

EASY

12th Tamil Nadu Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 7 - Dual Nature of Radiation and Matter>Exercise>Q 18

Suppose a beam of electrons with each electron having energy

E_{0}

is incident on a metal surface kept in an evacuated chamber. Then

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12th Tamil Nadu Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 7 - Dual Nature of Radiation and Matter>Exercise>Q 19

Matter waves

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12th Tamil Nadu Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 7 - Dual Nature of Radiation and Matter>Exercise>Q 20

An electron microscope is based on the principle of_____.

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12th Tamil Nadu Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 7 - Solved Physics Paper-2>Exercise>Q 14

The emission of electrons from a metal begins when green light is incident on it. The emission of electrons will be possible for which of the following group of colours?