Yes, any non-luminous body can be made luminous by heating it. When a non-luminous object is heated, it absorbs energy in the form of heat. This increase in energy causes the atoms or molecules in the object to vibrate more vigorously. As a result, the object emits electromagnetic radiation, including visible light. This is known as incandescence, and it is the process by which objects become luminous when heated.

Here is a detailed explanation of how heating a non-luminous body makes it luminous:

1. The Nature of Light:
Light is a form of electromagnetic radiation that can be detected by the human eye. It consists of particles called photons, which carry energy. When photons enter the eye, they stimulate the cells in the retina, allowing us to see.

2. Luminous and Non-Luminous Bodies:
Luminous bodies are objects that emit their own light, such as the Sun, stars, and light bulbs. Non-luminous bodies, on the other hand, do not emit light on their own. They become visible to us when light from a luminous source reflects off their surface and enters our eyes.

3. Heating Non-Luminous Bodies:
When a non-luminous body is heated, it absorbs energy from its surroundings. This energy causes the atoms or molecules in the object to gain kinetic energy, resulting in increased vibrations. As the vibrations become more intense, the atoms or molecules start to emit electromagnetic radiation.

4. Incandescence:
The process of emitting visible light due to heating is called incandescence. The increase in temperature causes the atoms or molecules to emit photons with enough energy to fall within the visible spectrum. This is why heated objects appear to glow and become luminous.

5. Color and Temperature:
The color of the light emitted by a heated object depends on its temperature. At lower temperatures, the light appears red or orange. As the temperature increases, the color shifts towards yellow, white, and eventually blue. This is because the energy of the emitted photons increases with temperature.

In conclusion, any non-luminous body can be made luminous by heating it. This is because heating increases the energy of the atoms or molecules, causing them to emit electromagnetic radiation, including visible light. The process is known as incandescence and is responsible for the glow observed in heated objects.