Wavelength of spectral line of cesium is 460nm. Calculate the frequency.
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We know, photons are moving with speed of light in vaccum. it means, when the wavelength of a spectral line of Cesium is 460nm. then, frequency of the line can be given by, speed of light in vaccum/wavelength of spectral line of Cesium. = 6.521 × 10¹⁴ Hz.
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