Class 10 > Human eye and colourful world
Human eye and colourful world Notes - Class 10
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Why sky apears blue?
When light ray enters our earth white light get dispersed and light like indigo ,blue ,violet get dispersed and hence sky apears blue
Question 2,Why red colour is used for danger signals ?
Answer2
Amongst all seven colours red has the highest wave length so it can be seen from longer distance .Therefore,danger signals are used as danger signal so that it can be
Seen from far.
When light ray enters our earth white light get dispersed and light like indigo ,blue ,violet get dispersed and hence sky apears blue
Question 2,Why red colour is used for danger signals ?
Answer2
Amongst all seven colours red has the highest wave length so it can be seen from longer distance .Therefore,danger signals are used as danger signal so that it can be
Seen from far.
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