Properties of light

1. 1-Light propagates in a straight line

1.1. Shadows

1.2. Eclipses

2. 2-Some objects produce light, others reflect it

2.1. luminous objects

2.2. non-luminous objects

3. 3-Light travels really fast (300.000km/s in a vacuum)

4. 4-Light only passes trough some objects

4.1. transparent

4.2. translucent

4.3. opaque

5. 5-Reflection

6. 6-Refraction

7. 7-Dispersion

7.1. white light is composed of seven colours

8. 8-Colours