physics revision: Part 2

physics revision: Part 2

1. ·

   • Reflection: When waves bounce from a surface back to the source
   • Refraction: When waves go through a substance
   • Diffraction: When the waves goes through a hole and creates a geometric shadow

2. ·

   • Ray diagram

3. ·

   • A real image has to be where the light is.( in front of a mirror, Behind a lense)
   • A virtual image is created by a diverging lense.

4. ·

5. the angle that a straight line, ray of light, etc., meeting a surface, makes with a normal to the surface at the point of meeting.

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