What are sources of heat and light?

Answer 1

Heat and light are generated by various chemical and nuclear reactions. The energy in fossil fuels was originally in dead plant matter, which had absorbed energy from the Sun. Geothermal heat energy comes from the molten layers of rock beneath the Earth's crust.

Other than these three (solar, fossil fuel, or geothemal), light can be generated from electricity from hydroelectric power, chemical reactions (glow sticks), bioluminescence (fireflies), and from direct nuclear emissions (radium/phosphor watch dials).

Answer 2

There are many different sources of light and heat. A commonly known example is the Sun, which supplies the Earth with the essential light and heat required for life. Another example is a light bulb. Even though the main function of a light bulb is to provide heat, it also generates heat as waste thermal energy. Heating most metals to a certain point will generate light. Some other examples include lightning, fire, fireworks, and explosions.

Answer 3

Sources of heat and light?

1.Resistance

2.Nuclear Reaction

3.Fiction

4.Chemical Reaction

Answer 4

The sun... Most heat and light on Earth comes from the sun during the day. And at night, it's the reflected light of the moon (that also comes from the sun) that lights the Earth.

Answer 5

Sun is the source of heat. It also provides thermal energy.