Question

Calculate,
1.Wavelength
2.Frequency
3.Wave number
of light wave who's period is 2.0x10^-10 s

Answer 1

Explanation:

frequency = 1/ time period = 1/2×10^-10 =

5×10^9 Hz.

Wavelength × frequency = speed of light =>

$wavelength \times 5 \times {10}^{9} = 3 \times {10}^{8} = >$

so wavelength = 3/50 = 0.06m.

Wavenumber = 1/wavelength = 1/0.06 = 50/3 per m. Hope it helps you.

Answer 2

Explanation:

hope it helps uhh mate..........