A photon whose wavelength is = 5.0 × 10−11 m is scattered straight backward. What is the wavelength of the scattered wave?

A) 5.0 × 10−11 m B) 4.5 × 10−11 m C) 5.5 × 10−11 m D) 6.0 × 10−11 m E) 6.5 × 10−11 m A) 5.0 × 10−11 m B) 4.5 × 10−11 m C) 5.5 × 10−11 m D) 6.0 × 10−11 m E) 6.5 × 10−11 m

A) can be localized in space. B) can be represented by an infinitely long wave having a single frequency. C) can be represented by a wave packet. D) travels at the phase speed of the infinitely long wave having the highest frequency. E) has the highest probability of being present in those regions of space where its component waves interfere destructively. A) can be localized in space. B) can be represented by an infinitely long wave having a single frequency. C) can be represented by a wave packet. D) travels at the phase speed of the infinitely long wave having the highest frequency. E) has the highest probability of being present in those regions of space where its component waves interfere destructively.

A neutron has a mass of 1.67 × 10−27 kg. The de Broglie wavelength is 1.4 × 10−10 m. How fast is the neutron going? (in m/s)

A) 3.4 × 103 B) 2.8 × 103 C) 3.9 × 103 D) 2.6 × 103 E) 1.7 × 103 A) 3.4 × 103 B) 2.8 × 103 C) 3.9 × 103 D) 2.6 × 103 E) 1.7 × 103

Exam 40: Introduction to Quantum Physics

Explore all topics

The number of photons per second passing a plane perpendicular to a collimated monochromatic (one frequency) beam of light transporting power P is directly proportional to

(Multiple Choice)

4.8/5

(26)

Question 21

An electron has been accelerated by a potential difference of 100 V. If its position is known to have an uncertainty of 1 nm, what is the percent uncertainty (Δp/p × 100) of the electron?

(Multiple Choice)

4.8/5

(30)

Question 22

In an experiment different wavelengths of light, all able to eject photoelectrons, shine on a freshly prepared (oxide-free) zinc surface. Which statement is true?

(Multiple Choice)

4.9/5

(37)

Question 23

What is the energy in eV of a photon of yellow light? λ = 500 nm.

(Short Answer)

4.7/5

(31)

Question 24

The threshold wavelength for photoelectric emission of a particular substance is 500 nm. What is the work function (in eV)?

(Multiple Choice)

4.8/5

(31)

Question 25

A pendulum located where has a 0.500 kg bob and a 4.00 Hz oscillation frequency. If it is released from a point 0.150 m above the lowest point it reaches, the number of quanta in this oscillation is

(Multiple Choice)

4.9/5

(42)

Question 26

A photon whose wavelength is = 5.0 × 10−¹¹ m is scattered straight backward. What is the wavelength of the scattered wave?

(Multiple Choice)

5.0/5

(43)

Question 27

A quantum particle

(Multiple Choice)

4.8/5

(35)

Question 28

Assume the Heisenberg uncertainty principle can take the form ΔEΔt ≥ h/4B. How accurate can the position of an electron be made if its speed is 5 × 10⁶ m/s and if the uncertainty in its energy is 10 eV?

(Multiple Choice)

4.8/5

(35)

Question 29

An electron is accelerated through a potential difference of 25000 V. What is the de Broglie wavelength of the electron (in m)?

(Multiple Choice)

4.8/5

(31)

Question 30

A baseball (1 kg) has an energy of 100 joules. If its uncertainty in position is 1 m, what is the percentage uncertainty (Δp/p × 100) in the momentum of the baseball?

(Multiple Choice)

4.7/5

(35)

Question 31

Assume electrons are accelerated through a potential difference of 25000 V inside a TV picture tube. What is the minimum wavelength that could be produced when the electrons strike the phosphor? (1 Å = 10−¹⁰ m)

(Multiple Choice)

4.8/5

(31)

Question 32

Because of Heisenberg's Uncertainty Principle, the velocity of a particle is known least precisely when the length of the wave packet representing the particle is

(Multiple Choice)

4.7/5

(32)

Question 33

The experimental observation(s) below that require(s) a quantum explanation for the photoelectric effect

(Multiple Choice)

4.9/5

(39)

Question 34

Film behind a double slit is exposed to light in the following way: First one slit is opened and light is allowed to go through that slit for time Δt. Then it is closed and the other slit is opened and light is allowed to go through that slit for the same time Δt. When the film is developed the pattern will be

(Multiple Choice)

4.9/5

(39)

Question 35

Suppose we use optical radiation (λ = 500 nm) to determine the position of the electron to within the wavelength of the light. What will be the resulting uncertainty in the electron's velocity?

(Short Answer)

4.7/5

(36)

Question 36

On a bright and sunny day, the intensity of solar radiation on the Earth's surface is 1 000 W/m². If the average wavelength of the sunlight is 500 nm, how many photons are incident on a square meter of the Earth's surface per second?

(Short Answer)

4.8/5

(44)

Question 37

A neutron has a mass of 1.67 × 10−²⁷ kg. The de Broglie wavelength is 1.4 × 10−¹⁰ m. How fast is the neutron going? (in m/s)

(Multiple Choice)

4.8/5

(36)

Question 38

What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work function is 5.0 eV when illuminated by a light whose wavelength is 200 nm?

(Multiple Choice)

5.0/5

(35)

Question 39

Because the factor h on the right side of the Heisenberg uncertainty principle has units of Joule-seconds, it suggests that the energy of a system also has uncertainty. The uncertainty in energy depends on the length of the time interval during which a system exists. ΔEΔt ≥ h/4π. Suppose an unstable mass is produced during a high-energy collision such that the uncertainty in its mass is m_e/100. (m_e = 9.11 × 10−³¹ kg.) How long will this particle exist?

(Multiple Choice)

4.9/5

(43)

Question 40

Showing 21 - 40 of 48

Exam 40: Introduction to Quantum Physics

The number of photons per second passing a plane perpendicular to a collimated monochromatic (one frequency) beam of light transporting power P is directly proportional to

An electron has been accelerated by a potential difference of 100 V. If its position is known to have an uncertainty of 1 nm, what is the percent uncertainty (Δp/p × 100) of the electron?

In an experiment different wavelengths of light, all able to eject photoelectrons, shine on a freshly prepared (oxide-free) zinc surface. Which statement is true?

What is the energy in eV of a photon of yellow light? λ = 500 nm.

The threshold wavelength for photoelectric emission of a particular substance is 500 nm. What is the work function (in eV)?

A pendulum located where has a 0.500 kg bob and a 4.00 Hz oscillation frequency. If it is released from a point 0.150 m above the lowest point it reaches, the number of quanta in this oscillation is

A photon whose wavelength is = 5.0 × 10−11 m is scattered straight backward. What is the wavelength of the scattered wave?

A quantum particle

Assume the Heisenberg uncertainty principle can take the form ΔEΔt ≥ h/4B. How accurate can the position of an electron be made if its speed is 5 × 106 m/s and if the uncertainty in its energy is 10 eV?

An electron is accelerated through a potential difference of 25000 V. What is the de Broglie wavelength of the electron (in m)?

A baseball (1 kg) has an energy of 100 joules. If its uncertainty in position is 1 m, what is the percentage uncertainty (Δp/p × 100) in the momentum of the baseball?

Assume electrons are accelerated through a potential difference of 25000 V inside a TV picture tube. What is the minimum wavelength that could be produced when the electrons strike the phosphor? (1 Å = 10−10 m)

Because of Heisenberg's Uncertainty Principle, the velocity of a particle is known least precisely when the length of the wave packet representing the particle is

The experimental observation(s) below that require(s) a quantum explanation for the photoelectric effect

Suppose we use optical radiation (λ = 500 nm) to determine the position of the electron to within the wavelength of the light. What will be the resulting uncertainty in the electron's velocity?

On a bright and sunny day, the intensity of solar radiation on the Earth's surface is 1 000 W/m2. If the average wavelength of the sunlight is 500 nm, how many photons are incident on a square meter of the Earth's surface per second?

A neutron has a mass of 1.67 × 10−27 kg. The de Broglie wavelength is 1.4 × 10−10 m. How fast is the neutron going? (in m/s)

What is the maximum velocity (in km/s) of a photoelectron emitted from a surface whose work function is 5.0 eV when illuminated by a light whose wavelength is 200 nm?

Physics and Measurement

Motion in One Dimension

Vectors

Motion in Two Dimensions

The Laws of Motion

Circular Motion and Other Applications of Newtons Laws

Energy of a System

Conservation of Energy

Linear Momentum and Collisions

Rotation of a Rigid Object About a Fixed Axis

Angular Momentum

Static Equilibrium and Elasticity

Universal Gravitation

Fluid Mechanics

Oscillatory Motion

Wave Motion

Superposition and Standing Waves

Temperature

The First Law of Thermodynamics

The Kinetic Theory of Gases

Heat Engines, Entropy, and the Second Law of Thermodynamics

Electric Fields

Gausss Law

Electric Potential

Capacitance and Dielectrics

Current and Resistance

Direct-Current Circuits

Magnetic Fields

Sources of the Magnetic Field

Faradays Law

Inductance

Alternating-Current Circuits

Electromagnetic Waves

The Nature of Light and the Principles of Ray Optics

Image Formation

Wave Optics

Diffraction Patterns and Polarization

Relativity

Quantum Mechanics

Atomic Physics

Molecules and Solids

Nuclear Structure

Particle Physics and Cosmology

Filters

A photon whose wavelength is = 5.0 × 10−¹¹ m is scattered straight backward. What is the wavelength of the scattered wave?

Assume the Heisenberg uncertainty principle can take the form ΔEΔt ≥ h/4B. How accurate can the position of an electron be made if its speed is 5 × 10⁶ m/s and if the uncertainty in its energy is 10 eV?

Assume electrons are accelerated through a potential difference of 25000 V inside a TV picture tube. What is the minimum wavelength that could be produced when the electrons strike the phosphor? (1 Å = 10−¹⁰ m)

On a bright and sunny day, the intensity of solar radiation on the Earth's surface is 1 000 W/m². If the average wavelength of the sunlight is 500 nm, how many photons are incident on a square meter of the Earth's surface per second?

A neutron has a mass of 1.67 × 10−²⁷ kg. The de Broglie wavelength is 1.4 × 10−¹⁰ m. How fast is the neutron going? (in m/s)