Question

Which of the following is not the source of light?
A. Candle
B. Black Body
C. Sun
D. Bulb

Answer 1

Hint:A source of light is any object that emits light. Luminous objects are also referred to as light sources. Light sources can be both natural and man-made (man-made). Natural sources of light include the sun and other stars, as well as insects such as the firefly.

Complete answer:
A light source is defined as anything that emits light. There are two types of lighting: natural and artificial. The Sun, stars, and candles are a few examples of natural light sources. Light bulbs, lamp posts, and televisions are a few examples of artificial light sources. We couldn't perceive the world around us without light sources, but not every object we see is a light source.

Many objects, such as tables, trees, and the Moon, merely reflect light from a light source.When a candle, the sun, or a light bulb glows, they emit light radiation and so serve as sources of light. However, because a black body does not emit light, it is not a source of light.A blackbody is a surface that absorbs all radiant radiation that falls on it. The word comes from the fact that incident visible light is absorbed rather than reflected, causing the surface to appear black.

Hence, the correct option is B.

Note: Sun It is a natural source of light energy and is thought to be the oldest. Many ecological processes rely on sunlight, including the water cycle, photosynthesis, sterilisation, and sanitation. The energy on the sun is produced via hydrogen fusion. The sun's light reaches planets and other bodies, including Earth.