Đề kiểm tra và Đáp Án môn vật lý a2 inteference hysics a2 test

Calculate the maximum increase in photon wavelength that can occur during Compton scattering... What is the energy in electron volts of the lowest-energy x-ray photon for which Compton s

Department of Engineering Physics

PHYSICS A2

TEST 3

Student’s name:

Student ID:

MCQ ANSWER SHEET :

Choose for each question only one correct answer and darken corresponding circle

in the following answer sheet.

Assume that a hailstone at 0°C

falls through air at a uniform temperature of

0°C and lands on a sidewalk also:

1

Calculate the maximum increase in photon wavelength that can occur during

Compton scattering

A 4pm

B 4,8pm

C 104pm

D 2.1pm

2

What is the energy (in electron volts) of the lowest-energy x-ray photon for which

Compton scattering could result in doubling the original wavelength?

A 4.18MeV

B 0.256MeV

C 10MeV D 2.145MeV

An x-ray photon is scattered from a free electron at rest The wavelength of

the scattered photon is 5.10*10-3nm, and the final speed of the struck electron

is 1.80 * 108 m/s

3

What was the initial wavelength l of the photon?

A 5,54.10-3 nm

B 4,5.10-3nm

C 1,34.10-3 nm

D 3,34.10-3 nm

4

Through what angle is the photon scattered?

A 600

B 540

C 450

D 740

A photon with wavelength 0.1100 nm collides with a free electron that is

initially at rest After the collision the wavelength is 0.1132 nm

5

What is the kinetic energy of the electron after the collision?

A 4.104m/s

B 107m/s

C 5.104m/s

D 2.107m/s

6

If the electron is suddenly stopped (for example, in a solid target), all of its kinetic

energy is used to create a photon What is the wavelength of this photon?

A 4nm

B 3,38nm

C 2.5nm

D 3.5nm An incident x-ray photon of wavelength 0.0900

nm is scattered in the

backward direction from a free electron that is ini- tially at rest

7

What is the magnitude of the momentum of the scattered photon?

A 7.10-24kg.m/s

B 3,4 10-24kg.m/s

C.10-24kg.m/s

D 2.10-24kg.m/s

8

What is the kinetic energy of the electron after the photon is scattered?

A 705eV

B 304eV

C 102 eV

D 2.102 eV

The photoelectric threshold wavelength of a tungsten surface is 272 nm

9

Calculate the threshold frequency

A 1015Hz

B 5 1015Hz

C 1.67.1015Hz

D 7.2.1015Hz

10 Calculate the maximum kinetic energy of the electrons ejected from this tungsten

surface by ultraviolet radiation

of frequency 1.45 * 1015 Hz

A 1.45eV

B 5.67eV

C 1.67eV

D 7.20eV

ĐÁP ÁN

1 Calculate the maximum increase

in photon wavelength that can occur during Compton scattering A 4pm

B 4.8pm C 104pm D 2.1pm

2 What is the energy (in electron volts) of the lowest-energy x-ray photon for which Compton scattering could result in doubling the original wavelength? A 4.18MeV

B 0.256MeV C 10MeV D 2.145MeV

An x-ray photon is scattered from a free electron at rest The wavelength of the scattered photon is 5.10*10 ³nm,⁻ and the final speed of the struck electron is 1.80 * 10⁸ m/s

3 What was the initial wavelength λ

of the photon? A 5.5410 ³ nm B. ⁻ 4.510 ³nm ⁻ C 1.3410 ³ nm* D.⁻ 3.34*10 ³ nm⁻

4 Through what angle is the photon scattered? A 60° B 54° C 45° D 74°

A photon with wavelength 0.1100 nm collides with a free electron that is initially at rest After the collision, the wavelength is 0.1132 nm

5 What is the kinetic energy of the electron after the collision? A 4.104m/s B 107m/s C 5.104m/s D.

2.107m/s

6 If the electron is suddenly stopped (for example, in a solid target), all of its kinetic energy is used to create a

photon What is the wavelength of this photon? A 4nm B 3.38nm C.

2.5nm D 3.5nm

An incident x-ray photon of wavelength 0.0900 nm is scattered in the backward direction from a free electron that is initially at rest

7 What is the magnitude of the momentum of the scattered photon?

A 710 ²⁴ kg.m/s B 3.4 ⁻ 10 ²⁴ kg.m/s C.⁻

10 ²⁴ kg.m/s D 2*10 ²⁴ kg.m/s⁻ ⁻

8 What is the kinetic energy of the electron after the photon is scattered? A 705eV B 304eV C 102eV D 2.102eV

The photoelectric threshold wavelength

of a tungsten surface is 272 nm

9 Calculate the threshold frequency.

A 10¹⁵ Hz B 510¹⁵ Hz* C 1.6710¹⁵ Hz

D 7.210¹⁵ Hz

10 Calculate the maximum kinetic energy of the electrons ejected from

this tungsten surface by ultraviolet radiation of frequency 1.45 * 10¹⁵ Hz.

A 1.45eV B 5.67eV C 1.67eV D.

7.20eV