Question

1. The wavelength of a violet light is 400 nm. Calculate the frequency and wavenumber.

Answer 1

Answer:

Violet light has a wavelength of ~400 nm, and a frequency of ~7.5*1014 Hz. Red light has a wavelength of ~700 nm, and a frequency of ~4.3*1014 Hz.

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The EM spectrum.

Type of Radiation Frequency Range (Hz) Wavelength Range

visible 4 - 7.5*1014 750 nm - 400 nm

near-infrared 1*1014 - 4*1014 2.5 μm - 750 nm