Definition of light is electromagnetic radiation that is visible to human eyes.
Light comes from light sources such as sun, moon, stars, fire, lights and others.
The natures of light are as follows:
1. Light can be reflected
For example, if we are in the car in the evening, then there is a car or other motorcycle behind us, our eyes will be dazzled when seeing rearview because of the headlights of vehicles behind us right rearview mirror on the inside or outside.
2. Light can propagate straight
An example is sunlight into the house through the glass roof, if we look at the light entering the home, it seems clearly white straight.
3. Light can be deflected or undergo refraction
An example is our home aquarium; if there is sunlight on the aquarium, it can be seen the fish and decoration rocks in the aquarium appearing larger than actual size.
4. Light can penetrate transparent objects
For example, when we open the window curtains in the morning; the light will go into the house through the clear glass of our house.
5. Light can be decomposed or dispersion
An example is when we see a rainbow. Basically the primary colors of light are red, green and blue. Rainbow colors (due to light refraction) are manifold but if it is united, it will be white. That’s why light can be decomposed.
