The wavelength of light of a particular colour is 5800 angstrom. Express it in
(a) nanometer
(b) metre
Answer is (a) 580nm
(b) 5.8 ?10to the power -7

Dear student,
1 angstrom =10-10m =10-9nm.
So we can write that,
5800 angstrom
=580 nm
= 5.8 x 10-7m.
Regards

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