I have learnt about “Light and Dark”.
1. We can see in light.
2. The examples
a) When fuel burns: fireworks, sun and stars
b) Electricity: bulb, TV
c) Reflection: moon
1. When there is no light we can not see.
2. When the moon comes between sun and earth it is dark.
3. When you close your eyes its dark.
4. Shadows are kind of darkness.