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A beam of light becoming dimmer is a physical change since it is reversible. Recharging its source will make the light beam bright again.
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∙ 9y ago
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Is giving off light a physical or chemical change?
I would think it to be a Physical Change. Not chemical.
Is production of heat or light physical or chemical change?
i think it would be physical because it is still energy.
Is a firefly giving off light a chemical or physical change?
It's not a change at all. It is simply what the firefly does. But it is a result of a chemical change within the firefly. A chemical reaction involves a transfer of energy. In this case, the energy would go into creating light waves from the molecules in the firefly, causing it to glow.
If a firefly glows in the dark is that a chemical or physical change?
It's a physical change. A chemical change is when a new substance is formed. A physical change is when something looks, feels, tastes, or smells different, but it's the same substance. You see the firefly is always glowing, it's just the fact that the human eye cannot see it because it is being over powered by the light of the Sun; but it's still the same firefly.
Mass does not change during a chemical change how about for a physical change?
Physical changes are like cutting paper. The mass does not change. Chemical changes do not change total mass either. If you put a candle in a sealed container so that you may measure the total mass of the candle and the air before burning, then light the candle electrically but keep everything sealed, the total mass after burning will still be the same. But if you measure only the candle, then its mass has changed. So the mass of one single 'ingredient' will change during a chemical change.
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
Is emission of light a chemical or physical change?
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.
Is production of heat or light a physical or chemical change?
Its a chemical change hottie
Is mixing two substances and light is produced a chemical or physical change?
chemical
Is light absorbed in physical change?
Heat absorption is a physical change. It can cause a change in state and/or a temperature increase, but the matter that is absorbing the heat does not change. It retains all of its physical and chemical properties that it had before absorbing the heat.
Is the generation of light by an electric lamp a chemical or physical change?
This is a physical change. When the electrons go through the filament (or gas), there is no chemical change, only the physical change of temperature. The electricity to power the light may be generated chemically (fossil fuels or batteries) or from a hydroelectric plant. The light from "glow sticks" is an example of light generated by chemical changes.
Ignition of matches a chemical or physical change?
chemical change because there is release of heat, light and energy.
Is giving off light a physical or chemical change?
I would think it to be a Physical Change. Not chemical.
Is light a physical property ora chemical change?
It is a physical change at least that is what I've been told
What kind of change occurs when you light a fire. A physical change or chemical change?
Both !
