Photoelectric effect

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/photoelectric-effect

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the discoverer?Albert Einstein (explanation), Heinrich Hertz (observation)
2. Why does light need a certain frequency to make electrons jump?Light is made of little packets called photons. If a photon has enough energy, it can give an electron enough push to leave the metal. If the photon is too weak, the electron stays.
3. How does the photoelectric effect help make solar panels work?Solar panels use the photoelectric effect to turn sunlight into electricity. Light hits the silicon cells, creates electron‑hole pairs, and the separated charges flow to make a current.

Photon: A quantum of electromagnetic radiation, behaving as a particle of light with discrete energy.
Work Function (Φ): The minimum thermodynamic work (energy) needed to remove an electron from the surface of a solid to a point in the vacuum immediately outside the solid.
Threshold Frequency (f₀): The minimum frequency of incident light required to eject electrons from a specific material.
Planck's Constant (h): A fundamental physical constant representing the quantum of action, relating photon energy to its frequency.