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Most of the time the emission of light is a physical change but there are some chemical reactions which emit light as a byproduct of the reaction.
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Is combustion a physical change?
NO its a chemical change for it can't be reversed
Is lighting a chemical or physical change?
Lighting is a physical change, not a chemical change. When a light switch is turned on, the flow of electricity through the bulb causes it to emit light, which is a physical reaction. No new substances are formed during this process.
Is it true that production of light is evidence that a physical change may have occurred?
Yes, the production of light can indicate that a physical change has occurred, but it's more commonly associated with chemical changes. In a physical change, light may be emitted due to phenomena like friction or the movement of particles. However, in chemical reactions, light often results from energy release as chemical bonds are formed or broken. Thus, while light production can be a sign of a change, it is not definitive for identifying whether that change is physical or chemical.
Is reflecting of light on a mirror a chemical change or a physical change?
The reflection of light on a mirror is a physical change. This process involves the bouncing of light waves off the surface of the mirror without altering the chemical composition of the light or the mirror itself. Since no new substances are formed and the materials retain their original properties, it is classified as a physical change.
Is fireworks a physical or chemical change?
Fireworks involve both physical and chemical changes. The lighting of the firework (ignition) is a chemical change that triggers a series of reactions which results in the colorful display seen (physical change) as different elements are heated and produce light.
Is Giving off light a physical change?
Giving off light is considered a chemical change, not a physical change. This is because the emission of light usually involves chemical reactions at the atomic or molecular level that result in the production and release of photons.
Is a light bulb on a chemical or physical change?
Physical change
Is switching a light bulb on a physical or chemical change?
Physical change
Is the production of light a chemical or physical change?
physical
What is iodine crystals sublime to make purple gas physical or chemical change?
The sublimation of iodine crystals to produce purple gas is a physical change. This is because the change in state from solid to gas does not involve a change in the chemical composition of the substance. The purple color of the gas is due to the absorption and emission of specific wavelengths of light by the iodine atoms.
Is production of heat or light a physical or chemical change?
Its a chemical change hottie
Is a firefly emitting light chemical or physical change?
That would be a chemical change because the firefly produces a bio-luminescent chemical. This chemical produces light which you see when the fire fly lights up!
Is a glow stick chemical change?
Yes, the glow stick undergoes a chemical change when it is activated. The chemical reaction between the components inside the stick creates the light emission.
Is a glow stick that produces light a chemical change?
Yes, a glow stick produces light by means of a chemical change.
Is combustion a physical change?
NO its a chemical change for it can't be reversed
Is flash cameras flashing a chemical or physical change?
The flash of a camera is a physical change, not a chemical change. A physical change is a change in the form of a substance without changing its chemical composition. In the case of a camera flash, electrical energy is converted into light energy, which is a physical process that does not alter the chemical makeup of the components involved.
Is heat light and change in odor indicate a physical change?
Heat, light, and change in odor can indicate a physical change depending on the context. For example, melting ice into water is a physical change because it does not alter the chemical composition of the substance. However, if a substance undergoes a chemical reaction that results in heat, light, and change in odor, then it would be considered a chemical change.
