Non luminous objects are those which cannot emit any light but they can reflect light if  light falls on them. For example, moon is non luminous but it reflect light when sun light falls on it.

Heating a Non-Luminous Body Makes it Luminous

A non-luminous body is an object that does not emit light. However, it can be made luminous by heating it. Let's see why heating a non-luminous body makes it luminous.

What is a Non-Luminous Body?

A non-luminous body is an object that does not produce light. It does not emit light of its own, nor does it reflect light. Examples of non-luminous bodies include rocks, wood, and metal.

How Does Heating Make it Luminous?

When a non-luminous body is heated, it starts to emit light. This happens because the heat energy causes the electrons in the atoms of the object to become excited. As the electrons move to higher energy levels, they release energy in the form of light. This process is called incandescence.

The amount of light emitted depends on the temperature of the object. As the temperature increases, the amount of incandescent light also increases. For example, a red-hot piece of metal will emit more light than a warm piece of metal.

Applications of Incandescence

Incandescence is used in many applications, including:

1. Light bulbs: Incandescent light bulbs work by heating a wire filament until it becomes incandescent and emits light.

2. Welding: Welding involves heating metal until it becomes incandescent and fusing it together.

3. Heat lamps: Heat lamps emit infrared radiation, which is a type of incandescent light that is not visible to the human eye.

Conclusion

In conclusion, a non-luminous body can be made luminous by heating it. This happens because the heat energy causes the atoms in the object to become excited and emit light through incandescence. This phenomenon is used in many applications, including light bulbs, welding, and heat lamps.

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