Diffraction-p1-5.5

Diffraction-p1-5.5

1. Normal

   • a line perpendicular to a surface

2. Spectrum

   • band of colours formed when sunlight passes though raindrops

3. Dispersion

   • the splitting up of a ray of light into it's constituent colours

4. Medium

   • substance that light passes through

5. Refractive index

   • tells you the amount of bending when light travels from one medium to another

6. Refraction

   • the change in direction of a ray of light passing from one medium to another

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