Light, Sound and Waves

Big Idea: Waves carry information without causing a permanent change on the intervening medium. More info...

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The Electromagnetic Spectrum
Light, Sound and Waves PRACTICAL PHYISCS

Spectra

Class practical: Students use a diffraction grating as a tool for observing the spectra from a variety of light sources.

Practical Activity 14-16

The Electromagnetic Spectrum
Light, Sound and Waves PRACTICAL PHYISCS

Absorption spectrum of sodium

Demonstration: Using a spectrometer to observe the absorption lines formed when white light passes through sodium vapour.

Practical Activity 14-16

The Electromagnetic Spectrum
Light, Sound and Waves PRACTICAL PHYISCS

Spectra formed by gratings

Demonstration: Observing the spectra from a variety of light sources.

Practical Activity 14-16

The Electromagnetic Spectrum
Light, Sound and Waves PRACTICAL PHYISCS

Learning from spectra

Spectra are beautiful things to see. The full spectrum of white light blazing across a screen is a surprise and a delight to...

Teaching Guidance 14-16

Emission/Absorption Spectra
Light, Sound and Waves IOP RESOURCES

Moseley’s obituary

The British physicist, Henry Moseley, showed that every element had a unique X-ray emission spectrum.

Stories from Physics 11-14 14-16

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