Light Sources | MCQs

Explanation

• The Moon is a non-luminous object because it does not produce its own light.
• Instead, it reflects the light of the Sun.

Explanation

The light from an ordinary lamp is hotter than a tube light because of incandescence.

The process by which light is produced through heat.

In an incandescent light bulb, an electric current heats a thin metal filament until it glows and produces light.

Explanation

• Luminous objects are those that emit light of their own.
• Such as the sun, stars, light/electric bulbs, glowsticks, torch, lamps, candle, fire flies, lantern fish and neon tube.
• They produce their own light through various processes like incandescence, fluorescence, or bioluminescence.

Explanation

• Stars generate their own light through nuclear fusion in their cores.
• It making them self-luminous.