reflection of light
- Created by: cookieshypiggy
- Created on: 12-05-13 12:54
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- Reflection of light
- transverse wave
- speed of light: 3.0X10^8m/s
- light travels in straight lines
- ray
- represented: straight line with an arrow
- beam
- bundle of rays
- 3 types
- parallel beam
- divergent beam (fan outwards)
- convergent beam (merge to a point)
- colour
- seen when objects transmit, reflect or absorb light
- selective reflection
- only reflects what specific colours
- opaque->reflect
- transparent->transmit
- "mixing"
- primary colours
- red
- blue
- green
- subtractive primaries
- red+blue=magenta
- red+green=yellow
- blue+green=cyan
- complimentary colours
- blue+yellow=white
- red+cyan=white
- green+magenta=white
- primary colours
- when all colours are absorbed, black is seen
- laws of reflection
- incident ray, reflected ray and the normal lie on the same plane
- angle of incidence =angle of reflection
- ray diagrams
- 1) draw object image (dotted lines, mark equal distances
- 2) draw lines from the "viewer" to the object's image (dotted line)
- 3) solidify the lines on the side of the mirror the "viewer" is at (solid lines, arrows)
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