Question

Write the definition of the following :-
1) Luminous object
2) Non-luminous object
3) Transparent, translucent and opaque objects.

Can you please solve these
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Answer 1

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

Answer 2

Answer:

1. If light is emitted by object,the object is called Luminous Object. Example. Sun emits its own light. Other examples are Stars, Torch, Candle, Filament of a Bulb, Hot red Iron, Fireflies.
2. Non Luminous or Illuminated Objects

• Some objects do not have their own light, they reflect light of other objects. These objects are called Non Luminous Objects. Example. Moon - Moon reflects the light from the sun. Other examples are Earth and other Planets, Paper, Trees.

3. Objects that are transparent look clear, like eye glasses or water. Light passes through transparent objects, so you can see through them. Some objects are translucent meaning they only let some light through. ... This means that no light is able to pass through them. For example, you are opaque.