Question

The yellow light given off by a sodium vapor lamp used for public lighting has a wavelength of 5.89x10^-7 m. What is the frequency of this radiation?​

Answer 1

λ= Wavelength = 5.89 × 10^-7 m => 589×10^-9 m

f = frequency = ?

c = Speed of light in a vacuum = 3×10^8 m/s

** Hz = 1/sec

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`f = (c)/(λ) \\ \\ f = \frac{3 * {10}^(8) }{5.89 * {10}^( - 7) } \\ \\ f = \frac{3 * {10}^(8) }{589 * {10}^( - 9) } \\ \\ f = 0.00509 * {10}^(17) \: (1)/(sec) \\ \\ f = 509 * {10}^( - 5) * {10}^(17) \: (1)/(sec) \\ \\ f = 509 * {10}^(12) \: (1)/(sec) \\ \\ f = 509 * {10}^(12) Hz \\ \\ f = 5.09 * {10}^(14) Hz`

I hope I helped you^_^