Reflection and Refraction in Waves
- Created by: Julia V
- Created on: 27-06-18 19:03
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- Reflection and Refraction
- Reflection
- Angle of Incidence = Angle of Reflection
- Angle of Incidence = the angle between the INCOMING WAVE and the NORMAL
- Angle of Reflection = the angle between the REFLECTED WAVE and the NORMAL
- The NORMAL
- An imaginary line that's PERPENDICULAR at the surface of the POINT OF INCIDENCE (surface where wave hits the boundary)
- Usually shown as a dotted line
- Specular Reflection
- When a wave is reflected in a single direction by a smooth surface
- E.g when LIGHT is reflected by a MIRROR = CLEAR reflection
- When a wave is reflected in a single direction by a smooth surface
- Diffuse Reflection
- When a wave is reflected by a rough surface and the reflected waves are are SCATTERED in LOTS OF DIFFERENT DIRECTIONS
- Angle of Incidence = Angle of Reflection
- Refraction
- When light waves are bent when they enter an new MEDIA (material)
- If a wave crosses a boundary and SLOWS DOWN it will bend TOWARDS THE NORMAL.
- If a wave crosses the boundary and SPEEDS UP it will bend AWAY from the normal.
- The wavelength changes but the frequency stays the same
- The Optical density of a material is a measure OF HOW QUICKLY LIGHT can travel through it. The HIGHER the optical density, the SLOWER the light waves travel through it.
- Reflection
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