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Education
Shine light of adjustable frequency and intensity on a metal and measure the stopping voltage needed to halt the resulting photocurrent — and discover that intensity changes the current but never the stopping voltage, while frequency does the opposite. Below a threshold frequency, no photoelectrons appear no matter how bright the light gets, the exact result that stumped classical physics. Sweep frequency, record stopping voltage, and fit a line through the data to extract Planck's constant yourself, straight from simulated "experimental" results.
Open Photoelectric Effect Lab (photoelectric.apps.vtc.com)
About Photoelectric Effect Lab
Photoelectric Effect Lab is an interactive learning tool on VTC. Shine light of adjustable frequency and intensity on a metal and measure the stopping voltage needed to halt the resulting photocurrent — and discover that intensity changes the current but never the stopping voltage, while frequency does the opposite. Below a threshold frequency, no photoelectrons appear no matter how bright the light gets, the exact result that stumped classical physics. Sweep frequency, record stopping voltage, and fit a line through the data to extract Planck's constant yourself, straight from simulated "experimental" results. It runs in your web browser and is free to use, and suits students, teachers and self-learners.
Who it's for: Students, teachers and self-learners
Features
- Shine light of adjustable frequency and intensity on a metal and measure the stopping voltage needed to halt the resulting photocurrent
- And discover that intensity changes the current but never the stopping voltage, while frequency does the opposite
- Below a threshold frequency, no photoelectrons appear no matter how bright the light gets, the exact result that stumped classical physics
- Sweep frequency, record stopping voltage
- Free to use in your browser
Frequently asked questions
What is Photoelectric Effect Lab on VTC?
Photoelectric Effect Lab is an interactive learning tool on VTC. Shine light of adjustable frequency and intensity on a metal and measure the stopping voltage needed to halt the resulting photocurrent — and discover that intensity changes the current but never the stopping voltage, while frequency does the opposite. Below a threshold frequency, no photoelectrons appear no matter how bright the light gets, the exact result that stumped classical physics.
Is Photoelectric Effect Lab free to use?
Yes. The VTC app catalog lists Photoelectric Effect Lab at no cost, and it runs in your web browser with nothing to install.
Who is Photoelectric Effect Lab for and how do I start?
It is aimed at students, teachers and self-learners. To start, open https://photoelectric.apps.vtc.com in your browser.