American Scientific, LLC · Columbus, Ohio · Exclusive U.S. Distributor of PHYWE Systems
American Scientific, LLC · Columbus, Ohio · Exclusive U.S. Distributor of PHYWE Systems
A complete setup that turns Einstein's photon model into a straight line on your students' graph.
The photoelectric effect is one key experiment in the development of modern physics. White light from a filament lamp is filtered by a grating spectrometer and illuminates a photocell. The maximum energy of the emitted photoelectrons is determined as a function of the frequency of the incident light. From the linear relationship between stopping voltage and light frequency, Planck's constant h is calculated, confirming Einstein's photon model and the quantum nature of light.
All units adapted for 110V/60Hz. Contact us for volume pricing and grant assistance.
Drag the slider to change the light's frequency and watch the stopping voltage follow a straight line.
Bring this to your lab →White light from a filament lamp passes through a grating spectrometer, so a single wavelength falls on the photocell.
Students find the voltage that just stops the fastest photoelectrons, then repeat across several wavelengths.
Plotting stopping voltage against frequency gives a straight line whose slope is h/e, yielding Planck's constant.
Typical student results: stopping voltage rises linearly with light frequency (illustrative).
Yes. Units supplied through American Scientific are adapted for 110V/60Hz and supported in the U.S., including warranty and replacement parts.
Tell us about your lab in the form above and we'll put together a complete, ready-to-teach configuration, so nothing is missing on day one.
Often, yes. Many institutions fund PHYWE equipment through NSF, Title IV and CTE programs, and our team can help you find and apply for the right opportunity.
