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

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to calculate the energy of a photon given its frequency or wavelength.

Objectives

Students will be able to

  • recognize that light consists of photons,
  • recognize that the energy of a photon is proportional to its frequency,
  • recognize that the energy of a photon is inversely proportional to its wavelength,
  • use the formula 𝐸=𝑓,
  • use the formula 𝐸=𝑐𝜆,
  • find the total energy of 𝑛 identical photons given the frequency or wavelength of each photon.

Prerequisites

Students should already be familiar with

  • the idea that light can be modeled as a wave,
  • terms for the basic properties of waves: frequency, period, wavelength, wave speed, and amplitude,
  • how to use the formula 𝑣=𝑓𝜆,
  • the idea that different colors of light have different frequencies and wavelengths,
  • the idea that light travels at a speed 𝑐 in a vacuum, with a value approximately equal to 3.00×10 m/s,
  • how to represent numbers using scientific notation.

Exclusions

Students will not cover

  • finding the maximum kinetic energy of electrons emitted from a material via the photoelectric effect,
  • understanding that photons have momentum or calculating the momentum of a photon given its frequency or wavelength,
  • understanding other particle-like behaviors of light, such as Compton scattering,
  • understanding that when an atom absorbs a photon, one of the electrons in the atom moves to a higher energy level and that when an atom emits a photon, one of the electrons in the atom moves to a lower energy level.

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.