Question

Write down four man-made sources of light.

Answer 1

Explanation:

There are several different types of artificial light sources. Some of these sources are incandescent bulbs, halogen lamps, metal halide, fluorescent tube, compact florescent light, and LEDs. All lights emit energy in the form of photons.

Answer 2

Answer:

1. bulb

2. candle

3. emergencylight

4. tourch