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Sophie is admiring Chris from afar when her phone application Ada suggests ways of communicating with Chris and attracting his attention. Through comparing gossip travelling around a school to sound waves, Ada discusses the key factors of waves such as their speed, frequency, wavelength and the simple definition of a wave.

Use a slinky to demonstrate how wavelength would change by stretching out the slinky. Use the video to physically demonstrate how the wavelength of light changes as the position of the source moves i.e. by taking larger or smaller steps. Practice the calculation of speed after watching the animation. Describe how the wavelength and the frequency affect the gossip wave. Research electromagnetic waves after watching the animation.