Light is electromagnetic waves that carry energy in the form of photons from one place to another whereas heat is the energy that moves from one place to another due to a temperature difference between the two points.
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Light is a form of electromagnetic radiation that our eyes can detect, while heat is a form of energy that causes atoms and molecules to move faster, increasing the temperature of an object. Light can be produced naturally by sources like the sun or artificially by light bulbs, whereas heat is typically generated as a byproduct of energy transfer or conversion.
When a candle burns, the primary types of energy released are heat and light. The heat is a result of the chemical reaction between the wax and the oxygen in the air, while the light is produced by the glowing carbon particles in the flame.
The difference between heat and temperature is that heat is the amount of energy given off by a piece of matter, and Specific Heat indicates the amount of heat necessary to change 1g of something by 1 degree. Temperature measures change in heat.
The difference between natural and artificial sources of light is that natural sources are produced by the sun while artificial light sources illuminate using energy from other sources and include incandescent bulbs.
Heat and light at an adequate distance.
Heat lightning is a term used to describe lightning that can be seen from a distance without hearing thunder. It is usually from a distant storm and is not directly associated with the thunderstorm you are observing. Regular lightning produces thunder because it is closer to you, and the sound of thunder travels slower than light, causing a delay between the flash of lightning and the sound of thunder.