1. He advocated the theory of light
2.1According to him light is a wave
3.Light travels in a straight line called
4. It is form when light is biocked
5. The bouncing back of light.
6. The bending of waves when passing from one medium to another.
7. The bending of waves around a barrier
8. It happens when two waves meets, they have an effect with each other.
9. It has a longest wavelength and lowest frequency.
10. It has a shortest wavelength and highest frequency.
11. An object that allows some light to pass through .
12. An object that allows all light to pass through.
13. An object that does not light to pass through.
14. The highness and lowness of sound
15. It is produced when there is a vibration​