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# Light presentation 001

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### Light presentation 001

1. 1.  We see things because they reflect light into our eyes: Homework
2. 2. Part 1 – Properties of Light  Light travels in straight lines: Laser
3. 3. Part 2 - Reflection  Reflection from a mirror: NormalIncident ray Reflected ray Angle of incidence Angle of reflection Mirror
4. 4.  The Law of Reflection Angle of incidence = Angle of reflectionIn other words, light gets reflected from a surface at ____ _____angle it hits it. The same !!!
5. 5. IntroductionRefraction is the bending of lightwhen the light passes from one medium to another. air glass
6. 6. IntroductionUseful words to describe refraction of light angle of incidence normal airglass angle of refraction
7. 7. Introduction From a denser to a less dense medium• e.g. from water to air normal water air• Light is bent away from the normal.
8. 8. Introduction From a less dense to a denser medium• e.g. from air to glass normal air glass• Light is bent towards the normal.
9. 9. B) REFRACTION OF LIGHT THROUGH A RECTANGULARGLASS SLAB :- Normal Incident ray i Air Glass r Rectangular glass slab Glass Air e Emergent ray Normal