Respuesta :
The frequency of the yellow orange light produced by the sodium-vapor street lights is 5.17 x 10¹⁴ sec⁻¹.
Sodium vapor lamp is a gas-discharge lamp using sodium in an excited state to produce light at a characteristic wavelength, near 589 nm.
Sodium is an alkali metal having low ionization energy. So, it release the electron easily. By sodium metal, the light of yellow color is emitted. The radiation of light emitted is an electromagnetic wave. The formula to be used is -
c = λ x ν
where, c is speed of light, ν is frequency and λ is the wavelength.
Since, wavelength, time period and frequency are related. So,
Time Period = 1
frequency
frequency = 3 x 10⁸ nm = 5.17 x 10¹⁴ sec⁻¹
580 x 10⁻⁹
To learn more about frequency and light,
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