Do you observe a shadow when there is just a source of light and nothing else in a room?
If you are in a dark empty room and are given two identical bars ( same mass ,same size, same weight and same texture). One of them is a bar magnet and the other one is an iron bar. There is nothing else in the room. You have to come out of the room with the magnet and leave the iron bar behind.
Find a way to identify the magnet bar and the iron bar.
A combination of wood and iron, just floats in the water at room temperature. Explain what you will observe when the water is heated.
A combination of wood and iron, just floats on the water at room temperature. What will you observe when the water is heated?
what do you observe when light passes through a dense forest