Physics · GCSE · Waves (Light & Sound)

How materials treat different wavelengths, and why waves refract

gcse-phys-6-6-2-2bFree1:17Heddy Score 2 of 7, below the standard

Plays from youtube-nocookie.com. No YouTube cookies until you press play.

What you need to know

Refraction happens because the wave changes speed at the boundary.
The frequency stays the same, so when the speed falls the wavelength becomes shorter.

In this clip

Heddy Score2/7, Below the standard

Trusted source · passed. The creator's own upload, live and playable here.
On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
Spec-true · not judged yet. Accurate, and right for the current UK specification.
Focused · passed. One idea, short enough to watch in one go.
Accessible · not judged yet. Good captions, clear sound and pictures.
Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.

★ passed · ☆ pending · ✕ failed

Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.

Why we picked it

Cognito lesson on refraction with ray diagrams and the link to wave speed; GCSE, the opening suits Year 8.