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- Light IS energy - and is mass-less, thus without substance.
- Light is a form of energy, there is no substance that give it energy. It is the energy contained in oscillating electromagnetic fields. It isn't purely electric or magnetic. Electric fields have the property of inducing a corresponding perpendicular magnetic field when they change. And changing magnetic fields similarly produce a perpendicular electric field. These changes in the fields propagate outwards in the form of "electromagnetic waves". So it is more sensible to consider magnetism and electricity as two parts of the same coin.
James Clerk Maxwell put all the laws of electricity and magnetism together and came up with Maxwell's equations which describe how electricity and magnetism work. Working through his equations he noticed that they implied that electromagnetic waves (in a vacuum) should travel at a constant speed.
When he plugged in the various electrical and magnetic constants that had been previously carefully measured by experiment he found that within the margin of error of the experiments his calculated speed exactly matched the experimentally measured speed of light. He guessed and said that because of this coincidence that light was an electromagnetic wave.
By assuming that this was correct great inroads were made in physics, including quantum mechanics and relativity.
This and later experiments proved this hypothesis to be true. They started in radio, where a conductor has changing electricity producing an obvious electromagnetic wave, then on to microwave which is the same thing but changing at a faster rate, all the way up to infrared and now visible light and beyond into ultraviolet and xrays.
What else can I help you with?
What type of energy does a flashlight give off?
A flashlight gives off light energy, which is a form of electromagnetic radiation. The light energy is created when the flashlight's batteries produce electrical energy that powers the light bulb or LED to emit light.
What part of a light bulb gives off electricity?
The part of an incandescent light bulb that gets hot and produces the light is called the filament.
What is a chemical reaction that gives off light inside a living organism called?
Bioluminescence - if it gives of visible light. However heat is also light and metabolism itself therefore gives off light, but you can not see it because it is infrared light.
What is reversible formula for photosynthesis and respiration?
Photosynthesis Needs light energy, co2, and h2o. It gives off Glucose and o2. Respiration needs o2 and glucose. It gives of energy, o2, and h2o.
What kinds of energy is given out by a firework?
Well, darling, when a firework goes off, it's throwing a party of energy types. We've got some thermal energy heating things up, light energy shining bright like a diamond, and sound energy making its presence known with a bang. So, next time you see a firework show, just remember it's a whole energy extravaganza up in the sky.
What from of energy does lighting gives off?
light and heat energy
What the sun gives off heat and light?
energy
A candle gives off light and heat these are examples of?
Energy
What part of the Sun gives off light energy?
photosphere
What type of energy does a light bulb give off?
It makes thermal energy (the heat), radiant energy (what we see), which is in essence more or less the same manifestation.
Which layer of the sun gives off heat and light?
The photosphere gives off heat and visible light.
What are some examples of chemical energy conv erted into light energy?
Fire The wood is a chemical energy and the fire (gasoline) is a chemical energy the heat from the fire obviously gives off heat and the "crackles" you hear gives off sound energy and the flame gives off light energy
Is a light bulb an example og electromagnetic energy?
A light bulb is not an example of electromagnetic energy, but the light which the bulb gives off is an example of electromagnetic energy.
Does the sun give off solar energy?
Yes, the sun gives off solar energy in the form of electromagnetic radiation which includes visible light, ultraviolet light, and infrared radiation. This energy is essential to sustain life on Earth and is harnessed for various purposes through solar energy technologies.
What forms of energy are given off by a light bulb?
A light bulb gives off mainly light energy as well as heat energy. When electricity flows through the filament in the bulb, it gets hot and emits light.
What is an example of electrial energy to light energy to heat energy?
electrical energy gives and provides energy to give energy and to show energy, light energy goes through a system of energy and gives off energy to provides it. heat energy is like sunlight it gives, take , provides, and uses energy.
What energy gives off lights?
Electrical energy can be converted to light. In addition, nuclear energy as in a nuclear weapon will give off a blinding flash of light. Also, using fireflies as an example, chemical reactions can also give off light energy.
