length of radiation 85 NM falls on a surface will the surface be visible or not
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surface will always be visible.
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Q :- Length of radiation 85 NM falls on a surface....
Ans:- Yes, Surface area will be Visible.
Q :- Length of radiation 850 NM falls on a surface....
Ans:- No, this surface will not be visible to us becoz the radiation which is falling on this surface is mainly INFRARED radiation whose wavelength is between 700 nm to 1000 nm.
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