A photon is a bundle of electromagnetic energy. It is the basic unit that makes up all light. The photon is sometimes referred to as a "quantum" of electromagnetic energy. They have zero mass. They have no electric charge. They are stable. They carry energy and momentum which are dependent on the frequency. They can have interactions with other particles such as electrons. They can be destroyed or created by many natural processes. When in empty space, they travel at the speed of light.

The two lines A and B, shown in the graph of Fig. 20 . 18 , plot the de-Broglie wavelength λ as a function of 1 V V is the accelerating potential for two particles, having the same charge q . Which of the two represents particle of the heavier mass?

The de-Broglie wavelength of particle A of mass m A at a particular value of stopping potential V = V ' can be given as: λ A = h 2 m A q V ' Where h is the Planck's constant ⇒ λ A = h 2 m A q × 1 V ' . . . 1 The de-Broglie wavelength of particle B of mass m B at a particular value of stopping potential V = V ' can be given as: λ B = h 2 m B q V ' Where h is the Planck's constant ⇒ λ B = h 2 m B q × 1 V ' . . . 2 On comparing the equations 1 and 2 with the equation of straight line y = m x + c , we get that the slope of the line for particle A is h 2 m A q and the slope of the line for particle B is h 2 m B q . We know that the line making more angle with the positive side of x-axis will be the line having greater value of slope. Hence, from the given graph, it is clear that the slope of line B is more than that of line A . ∴ h 2 m B q > h 2 m A q ⇒ m A > m B Hence, particle A is heavier than particle B .

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Gamma Question Bank for Medical Physics>Class XII>Chapter 28 - Dual Nature of Radiation and Matter>Assigment

Embibe Experts Solutions for Exercise 2: Assigment

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Embibe Experts Physics Solutions for Exercise - Embibe Experts Solutions for Exercise 2: Assigment

Attempt the practice questions from Exercise 2: Assigment with hints and solutions to strengthen your understanding. Gamma Question Bank for Medical Physics solutions are prepared by Experienced Embibe Experts.

Questions from Embibe Experts Solutions for Exercise 2: Assigment with Hints & Solutions

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Gamma Question Bank for Medical Physics>Chapter 28 - Dual Nature of Radiation and Matter>Assigment>Q 1

The momentum of the photon of wavelength $5000 Å$ will be

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Gamma Question Bank for Medical Physics>Chapter 28 - Dual Nature of Radiation and Matter>Assigment>Q 15

Calculate the de Broglie wavelength of an electron accelerated from rest through a potential difference of 520V.

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Gamma Question Bank for Medical Physics>Chapter 28 - Dual Nature of Radiation and Matter>Assigment>Q 16

What is a photon?

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Gamma Question Bank for Medical Physics>Chapter 28 - Dual Nature of Radiation and Matter>Assigment>Q 18

The wavelength of an electromagnetic radiation is doubled, how will the energy of the photon change?

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Gamma Question Bank for Medical Physics>Chapter 28 - Dual Nature of Radiation and Matter>Assigment>Q 22

What is the energy in joules associated with a photon of wavelength $4000 \overset{\circ}{A}$ .

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Gamma Question Bank for Medical Physics>Chapter 28 - Dual Nature of Radiation and Matter>Assigment>Q 36

An electron of mass $m$ and charge $e$ is accelerated from rest through a potential difference $V$ in a vacuum. The final speed of the electron will be

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Gamma Question Bank for Medical Physics>Chapter 28 - Dual Nature of Radiation and Matter>Assigment>Q 12

How many electron volts make up one joule?

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Gamma Question Bank for Medical Physics>Chapter 28 - Dual Nature of Radiation and Matter>Assigment>Q 22

The two lines A and B, shown in the graph of Fig. $20.18$ , plot the de-Broglie wavelength $(λ)$ as a function of $\frac{1}{\sqrt{V}} (V is the accelerating potential)$ for two particles, having the same charge $q$ . Which of the two represents particle of the heavier mass?

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