Question

Q. Calculate the wavelength, frequency , wave number ,of light wave, whose time period is 2.0x10 -¹² sec
wanna answer​

Answer 1

Answer:

Frequency (ν) of light `= 1/("period")`

` 1/(2.0xx10^(-10)) s = 5.0xx10^(9)s^(-1)`

Wavelength `(lambda)` of light =`c/v`

Where

c = velocity of light in vacuum =` 3xx10 ^(8) m//s`

Substituting the value in the given expression of `lambda` :

`lamda (3xx10^(8))/(5.0 xx 10^(9)) = 6.0xx10^(-2) m `

Wave number `(barv)` of light `=1/lambda=1/(6.0xx10^(-2))=1.66xx 10^(1)m^(-1)=16.66 m`