Light is nothing but information so we can apply the energy conversation theorem to it?

Question

INFORMATION IS CHANGE FROM ONE FORM TO ANOTHER FORM BUT IT IS NOT DISTROIED CAN WE APPLY ENERGY CONVERSATION THEOREM TO IT.

Answer 1

No. Semantics is a wonderfully useful but under-appreciated field of study. Light is a substance and information is a property. They are categorically distinct concepts. Information can be one property of a beam of light if the light is modulated, but an unmodulated beam contains no information.

Information is not conserved. Entropy is a measure of information loss, and entropy always increases. When a highly ordered (spatially modulated) state such as a book decays in a landfill, it becomes an homogeneous mass of compost, and the information is lost irretrievably.

Answer 2

"Information itself may be loosely defined as "that which can distinguish one thing from another." " [See source.]

In fact, using quantum entanglement, a form of information can be exchanged instantaneously to anywhere in the known universe. This means infinite velocity. However, physical information, which is what our more commonplace information is, is still limited by light speed. [See source.]

As information is exchanged, it takes energy to do that. In fact, a definition of energy is the capability to do work or cause a change. And information requires change for distinguishing one feature from another; so it requires energy for that change. It appears clear to me (and you it appears) that energy is involved in information exchange; so the conservation of energy law must apply.

I'm not clear that "light is nothing but information." It is certainly energy and has no mass, but it's inherently energy without distinguishing features. That is E = hf for one photon is just like E = hf for another one at the same frequency. So I don't think light is and of itself information or even the carrier of information. [By the way photon entanglement has been observed.]

So here's my conservation of information law. Total system information TI = PI + KI + WI; where PI is potential information, KI is exchanged information, and WI is work to change PI into KI. And due to conservation of information TI for a given system is fixed, which means as work is done (WI), PI diminishes while KI increases to keep TI constant. So, to me, the issue is...what does potential information entail?

Answer 3

Information can't be transmitted at the speed of light, therefore light is not information.