Why is an electric bulb luminous whereas a laptop non luminous. Both of them are operated by electricity.
Answers
both are electrical but bulb produces light when switched on and we can see objects in our surrounding whereas laptop also produces light but not so sufficient that we can see things or objects around us.
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Answer:
Luminous objects are those which emit light on their own. Example:-Sun, firefly.
Non-luminous objects are those which reflect the light from luminous bodies. Example: - Moon, mirror.
Based on the above definitions we can classify the objects as opaque, transparent, translucent, luminous and non-luminous.
Opaque: A piece of rock, a sheet of aluminium, a mirror, a wooden board, a CD, an umbrella, a wall, a sheet of carbon paper, a sheet of cardboard.
Transparent: Air, water, a sheet of plane glass.
Translucent: A sheet of polythene, smoke, fog, a sheet of cellophane, a wire mesh.