Yellow light emmited from a sodium lamp has a wavelength of 580 mm. Calculate the frequency and wave number of the yellow light.
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Wavlength (λ)= 580 nm
= 580 × 10^-9 m
frequency = C / λ
where c = (speed of light i.e,3×10^8 m/s)
on putting C & λ in the formula :
frequency = ( 3×10^8 ) / (580×10 ^-9)
frequency = 5.17 × 10^14
or
= 5.2 × 10^14
Wave number = 1/λ
= 1/580×10^-9
= 1.724 × 10^6 m^-1
hOpe THis wiLL hElp
= 580 × 10^-9 m
frequency = C / λ
where c = (speed of light i.e,3×10^8 m/s)
on putting C & λ in the formula :
frequency = ( 3×10^8 ) / (580×10 ^-9)
frequency = 5.17 × 10^14
or
= 5.2 × 10^14
Wave number = 1/λ
= 1/580×10^-9
= 1.724 × 10^6 m^-1
hOpe THis wiLL hElp
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