# Lesson Worksheet: The Quantization of Electromagnetic Radiation Physics • 9th Grade

In this worksheet, we will practice calculating the energy of a photon given its frequency or wavelength.

Q1:

A laser emits photons, each with a frequency of Hz. What is the total energy radiated by the laser? Use a value of J⋅s for the Planck constant. Give your answer to the nearest joule.

Q2:

What is the energy of a photon that has a wavelength of 400 nm? Use J⋅s for the value of the Planck constant and m/s for the value of the speed of light in free space. Give your answer in scientific notation to two decimal places.

• A J
• B J
• C J
• D J
• E J

Q3:

What is the frequency of a photon that has an energy of J? Use a value of J⋅s for the Planck constant. Give your answer in scientific notation to two decimal places.

• A Hz
• B Hz
• C Hz
• D Hz
• E Hz

Q4:

Photon A has a wavelength that is four times that of photon B. What is the ratio of the energy of photon A to the energy of photon B?

• A2
• B
• C
• D4
• E1

Q5:

What is the difference in the energy of a blue photon, with a wavelength of 400 nm, and a red photon, with a wavelength of 700 nm? Use a value of J⋅s for the value of the Planck constant and m/s for the value of the speed of light in free space. Give your answer in joules in scientific notation to two decimal places.

• A J
• B J
• C J
• D J
• E J

Q6:

What is the difference in the energy of a Hz photon and a Hz photon? Use a value of J⋅s for the Planck constant. Give your answer in scientific notation to two decimal places.

• A J
• B J
• C J
• D J
• E J

Q7:

What is the wavelength of a photon that has an energy of J? Use J⋅s for the value of the Planck constant and m/s for the value of the speed of light in free space. Give your answer in metersin scientific notation to two decimal places.

• A m
• B m
• C m
• D m
• E m

Q8:

Which of the following is the correct formula for the energy of a photon given its frequency, where represents the Planck constant and represents the speed of light?

• A
• B
• C
• D
• E

Q9:

What is the frequency of a photon that has an energy of 3.00 eV? Use eV⋅s for the value of the Planck constant. Give your answer in hertz in scientific notation to two decimal places.

• A Hz
• B Hz
• C Hz
• D Hz
• E Hz

Q10:

Photon has twice the frequency of photon . What is the ratio of the energy of photon to the energy of photon ?

This lesson includes 17 additional questions for subscribers.