Light and Shadow
TAN TIENG SAN PEARLYNにより
1. Light is a form of energy
2. Some examples of light are
2.1. Stars
2.2. Sun
2.3. fire
2.4. lamp
3. MOON IS NOT A LIGHT SOURES. IT REFLECTS LIGHT FROM THE SUN.
4. The speed of light in a vacuum is defined to be exactly 299,792,458 m/s (approximately 186,282 miles per second).
5. Shadow is a dark patch of light
6. examples of things that will cast a shadow
6.1. cardboard
6.2. metal