Yellow light emitted from a sodium lamp has a wavelength (lambda) of 580 nm. Calculate the frequency (ν) and wave number (bar(V) ) of the yellow light.

omreknaqec7

omreknaqec7

Answered question

2023-02-18

Yellow light emitted from a sodium lamp has a wavelength ( λ) of 580 nm. Calculate the frequency (ν) and wave number ( V ¯ ) of the yellow light.

Answer & Explanation

a4dlity3v

a4dlity3v

Beginner2023-02-19Added 6 answers

From the wording,
λ = c v
we get, v = c λ .............(i)
Where, ν = frequency of yellow light
c = velocity of light in vacuum = 3 × 10 8   m / s
λ = wavelength of yellow light = 580 n m = 580 × 10 9   m Substituting the values in expression (i):
v = 3 × 10 8 580 × 10 9 = 5.17 × 10 14 s 1
As a result, the sodium lamp's yellow light emission frequency = 5.17 × 10 14 s 1
Wave number of yellow light v ¯ = 1 λ , = 1 580 × 10 9 = 1.72 × 10 6 m 1

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