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Explain the Light ?
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Answer / guest
It is the cause of the physical sensation of vision. A body
which emits light by itself is known as luminous body e.g.
visible when illuminated by light from other sources is
called non-luminous body e.g. chair, table etc.
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Answer / guest
light is energy and light is all around . the only light
the human eye can detect is between 450nm and around 740nm.
because light is energy it is also heat. the real question
is what is darkness? we know that absolute darkness can not
be obtained only the absence of visible light.
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General Physics 
