This lesson includes 17 additional questions for subscribers.

# 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.

**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

**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