Question

Why can you see an electric electric bulb at night when it is switch on

Answer 1

As because light from the bulb forms an image on the retina of your eyes. retina acts as a screen.

Answer 2

This is what happens in our electrical circuit. When we switch of the circuit then certain amount of electron flow and they bump into the wire. The incandescent light bulb turns electricity into light by sending electric current trough a thin wire, called filament, which burns so, we see an electric.