Refraction and diffraction
- Created by: jaaaz_v
- Created on: 12-06-15 10:29
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- Refraction
- Diffration
- When waves bend around obstacles making the waves spread out
- Waves spread out when they pass a gap or obstacle
- Amount of diffraction depends on the size of the gap depending on the wavelength of the waves
- The narrower the gap or the longer the wavelength, the more the wave spreads out
- A narrow gap is one that is the same as the wavelength f the wave
- Light can be diffracted but needs a v small gap because it has a small wavelength
- When a wave changes speed between two substances it changes direction
- If a wave hits the boundary between two medium face on it carries on in the same direction
- If a wave hits a medium at an angle the wave changes direction
- Its refracted
- Only happens when waves hit a new medium at an angle
- If traveling along the normal they will change speed but will not be refracted
- Diffration
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