Brightness is a value of luminosity verses distance as viewed from a point.
From Earth, the luminosity of a star is it's apparent magnitude, whereas absolute magnitude is it luminosity as viewed from a set point (for stars this value is about 32 light years).
Because of this a star can loose temperature but gain in diameter and appear brighter, in contrast a star can contract and thus shrink, but heat up and appear brighter.
Brightness is related to temperature, not the other way around.
A decrease in radiative equilibrium temperature
Temperature is lowered. Humidity is increased in a cold front.
They begin to move faster. The increased temperature increases the energy of the molecule.
If you increase the temperature of a gas, its particles (atoms or molecules) will speed up. If it is in a closed container, the pressure will also increase.
When the water is heated, its molecules get additional kinetic energy due to it. This results in their increased velocity. As their kinetic energy gets increased, they try to overcome the force of attraction between themselves and eventually water changes into water vapour.
The hotter the star, the brighter. Ex: A stove
As they get hotter, they usually get brighter.
What happens depends on the temperature coefficient of the diode. If that diode has a positive temperature coefficient, it resistance increases with increased temperature. A diode with a negative temperature coefficient does the opposite.
A decrease in radiative equilibrium temperature
It increases.
As the bulb becomes brighter, the temperature of the filament increases. This is due to the increased flow of electricity through the filament, causing it to heat up and emit more light. The relationship between brightness and temperature is direct - the brighter the bulb, the hotter the filament.
When the temperature of a system is increased, the partial pressure of oxygen also increases.
The solubility of solids in water increases with the increasing temperature.
The pressure of a gas increases with an increase in temperature.
Temperature is lowered. Humidity is increased in a cold front.
The pressure of a gas increases with an increase in temperature.
The volume increases Source: