Electromagnetic Spectrum & Photon Energy

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About this simulation

Sweep from radio waves to gamma rays. Compare wavelength, frequency and the energy of one photon with a visible-light close-up.

What students can explore

If you halve the wavelength, what happens to frequency and photon energy?
Vacuum model: c = λf and E = hf. Band boundaries are approximate; X-rays and gamma rays overlap in practice. Wave spacing is compressed for display; colours outside visible light are illustrative.

Learning objectives

1If you halve the wavelength, what happens to frequency and photon energy?

Questions teachers ask

If you halve the wavelength, what happens to frequency and photon energy?

Both double. Change wavelength while holding the speed of light constant; brightness is not the energy of one photon.

About the model

Vacuum model: c = λf and E = hf. Band boundaries are approximate; X-rays and gamma rays overlap in practice. Wave spacing is compressed for display; colours outside visible light are illustrative.

Embed this simulation

Drop it into your LMS, blog, or class site — free.

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