If light is a kind of energy and energy is massless so how does light exists
[From: ] [author: ] [Date: 11-12-25] [Hit: ]
Even in some cases ( sticky tape) through mechanical forces.And there are chemical glow sticks too.But every one has an ongoing external source of energy or they must gradually lose the ability to emit light.-Because light is nothing but photons. Photons are nothing but energy. Mass is nothing but huge amount of energy.......
The temperature quickly falls and the metal stops glowing.
We may add energy through UV radiation or other high energy radiation.
Or though strong electric fields.
Even in some cases ( sticky tape) through mechanical forces.
And there are chemical glow sticks too.
But every one has an ongoing external source of energy or they must gradually lose the ability to emit light.
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Because light is nothing but photons. Photons are nothing but energy. Mass is nothing but huge amount of energy.
Because the production of light/waves/photons happens as: A normal electron gains energy from an outer source. Then, the electron moves with an extra kinetic energy. After that, the electron loses the extra kinetic energy in the form of photons and light/waves are produced.
This supports Newton's law saying that Energy cannot be formed nor destroyed, but can change from one form to another.
I hope I helped =)
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Energy can convert from one form to another.
Photons get absorbed by the optic nerve and converted to chemical and/or electrical energy that our brain interpets as light
Electrons absorb photons (energy) and get raised to a higher energy level ( they get pushed to the top of a hill). When they fall back to the original level they release a photon of the same energy content of the difference between the excited state and the final state. By conservation of energy they can do that forever.
Sometime, a photon gets absorbed and converted to another form: heat, electrical, chemical, etc. That too can go on forever, as long as photons keep being added
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this is quite a question! i'll repost some links later on for you to check out. recall that light is able to shine on metals at certain wavelengths and provide enough energy to release an electron and emit light at a different wavelength of a lower frequency. this demonstrates the particle and wave nature by being able to convert its energy into removal of an electron and energy release of light. also, electrons are not what light is composed of. light is quantized as photons and have different properties than electrons. they behave similarly though because they are both small scale.
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You seem to be laboring under the misapprehension that mass is required for existence. Why?
State your sources/references, etc.
As for the second part of your question - study up on the Heisenberg Uncertainty Principle.
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