man made:
Lighter
Light bulb
Torch
Screen
Traffic Lights
Natural:
Sun
Fire
Flame
Lightning
Lava
Reflection
1 triangle the light goes through and makes a shadow at the other side
2 flat mirror it reflects of in front of it and makes a shadow behind it
3 curved mirror it has a shadow behind it and has a moon shape in front of it
4 curved plastic it makes a triangle behind it
5 flat plastic it makes 3 lines with light
6 rectangle it makes a shadow behind it
