#science/y9/waves
- As the frequency increases, the wavelength decreases.
- What differentiates between frequency and wavelengths is that they are inversely related.
- Remember ‘ROYGBIV’ for rainbow colours (red, orange, yellow, green, blue, indigo, violet).
- Everything ultraviolet and beyond is ionising which means it causes damage to our cells.
- Microwaves and radio waves are used in communication.
Wave behaviours §
- These are all different ways waves can react when hitting a surface.
| Wave behaviour | Definition |
|---|
| Transmission | Transmission is when waves keep travelling in the same direction through an object. |
| Reflection | Reflection is when waves bounce off an object. |
| Refraction | Refraction is when waves redirect as it passes from one object to another. For example, a pencil dipped in water would refract in another direction where it is in the water. |
| Diffraction | Diffraction is the spreading out of waves as they pass through or around objects. |
| Absorption | Absorption is when waves are absorbed by an object. For example, black light absorbs all colours in the spectrum and reflects none. |
| Scattering | Scattering is when waves are forced to go off their straight path to imperfections in the medium. |
Practical experiments on wave behaviours §