.7 Among ultraviolet ray X-ray and red light
which makes a body visible ?
a) Red light and X-ray
b) Ultraviolet ray and Red light
c) Ultraviolet ray and X-ray
d) Red light
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Answer:
Ultraviolet ray and Red pight
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D option should be correct
as Red light lies in visible light region
Visible light region is responsible that we can see everything
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