Answer:
a) luminous objects.
= If light is emitted by object,the object is called Luminous Object.
Examples: Torch, Candle, etc.
b) non- luminous objects.
= Objects that cannot emit light energy by themselves are known as non-luminous objects.
Examples: Moon, wood, etc.
c) opaque objects.
= The object which do not allow the light to pass through are called opaque object.
Examples: stone, wood etc.
d) translucent objects.
= Those objects through which light can pass partially are called translucent objects.
Examples: paper, plastic, etc.
e) transparent objects.
= Those object through which light can pass easily are called transparent.
Examples: water, glass, etc.
Hope it helps !
