Calculate the frequency and wave number of radiation with wavelength $480 n m$ .

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Solution

Given :

$λ = 480 n m = 480 \times 10^{- 9} m$ $[∵ 1 n m = 10^{- 9} m]$

$c = 3 \times 10^{8} m / s e c$

Frequency, $v = \frac{c}{λ} = \frac{3 \times 10^{8} m s^{- 1}}{480 \times 10^{- 9} m} = 6.25 \times 10^{14} s^{- 1}$ $= 6.25 \times 10^{14} H z$ .

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Calculate the frequency and wave number of radiation with wavelength 480 nm.

Given :λ=480nm=480×10−9m [∵1nm=10−9m]c=3×108m/secFrequency, v=cλ=3×108ms−1480×10−9m=6.25×1014s−1 =6.25×1014Hz.

Calculate the frequency and wave number of radiation with wavelength $480 n m$ .

Given :

$λ = 480 n m = 480 \times 10^{- 9} m$ $[∵ 1 n m = 10^{- 9} m]$

$c = 3 \times 10^{8} m / s e c$

Frequency, $v = \frac{c}{λ} = \frac{3 \times 10^{8} m s^{- 1}}{480 \times 10^{- 9} m} = 6.25 \times 10^{14} s^{- 1}$ $= 6.25 \times 10^{14} H z$ .