Red light has a wavelength of 7000 Armstrong .In nm(newton metre) ,it is
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red light has a wavelength =780-622 nm
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Its angstrom not Armstrong and its nanometer not newton metre
and 7000 angstrom is equal to 700 nanometer
and for your information 1 angstrom = 10^-10 metres
1 nanometer = 10^-9 metres
and 7000 angstrom is equal to 700 nanometer
and for your information 1 angstrom = 10^-10 metres
1 nanometer = 10^-9 metres
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