It's Blackbody Radiation
Any hot object will glow brighter when it is hotter.
Light energy is a form of energy emitted by a glowing object. When an object becomes hot enough to glow, it releases light energy in the form of visible light.
The effect you are referring to is called incandescence. It occurs when an object, such as a filament in a light bulb, becomes hot enough to emit visible light as a result of being heated.
Yes, a glow stick is considered a luminous object because it emits light through a chemical reaction.
The glow stick in the cold water will not glow as bright as the glow stick in the hot water because when you cool the glow stick down, the chemical process will slow down. The glow stick in the hot water will glow brighter but for a shorter period of time.
To revive a glow stick that has lost its glow, you can try placing it in hot water to help the chemicals inside mix again and potentially restore its glow.
To make a glow stick glow again, try placing it in hot water or shaking it vigorously to mix the chemicals inside. This may help reignite the glow.
To make glow sticks glow again, try placing them in hot water or in the freezer for a few minutes. This can help reactivate the chemicals inside the glow sticks and make them glow brighter.
Heat them, for example by briefly putting them in hot water. They will glow more brightly, but won't last as long.
When hot objects emit visible light due to being heated, it is called incandescence. This phenomenon occurs as the atoms in the object vibrate at higher temperatures, causing them to release photons in the visible spectrum.
Because they are extremely hot.
To revive glow sticks and make them glow again, you can try placing them in hot water or using a hair dryer to heat them up. This can help reactivate the chemicals inside the glow sticks and restore their glow.