what is meant by lustrous,non lustorus, luminous,non luminous, hard, soft
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Answer:
LUMINOUS OBJECTS - DEFINITION
Objects like the sun that give out or emit light of their own are called luminous objects.Others examples: Electric bulb,torch etc
Non-luminous objects are objects which doesn't have their own light but visible only when light from luminous source reflects from them. For example: Moon, chair, a painting etc
NON LUMINOUS OBJECTS-EXAMPLE - DEFINITION
A non-luminous object is one that does not produce its own light, although it can still reflect light from other sources. The Moon is an example of a non-luminous object; we can only see the Moon because it reflects light from the Sun (which is a luminous object).
The computer /mobile screen you're looking at right now is luminous, but the page of a book is non-luminous, which is why you need a light on to read.
Explanation:
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