Saved Bookmarks
| 1. |
The wavelength of a blue light is 4800Å. Calculate the frequency and wave number of this light. |
|
Answer» Solution :Given that `c = 3 xx 10^(8)ms^(-1)` `lambda=4800Å=4800xx10^(-10)m=4.8xx10^(-7)m` `"V = frequency = ? "` `"Using the RELATION"upsilon=(c )/(lambda)=(3xx10^(8))/(4.8xx10^(-7)m)` `=6.25xx10^(14)s^(-1) or 6.25xx10^(14)Hz` `"The wave number is the reciprocal ofwavelength "=bar(upsilon)=(1)/(lambda)=(1)/(4.8xx10^(-7)m)=2.0833xx10^(6)m^(-1)` `"Thus frequency of blue light is "6.25 xx 10^(14) Hz` `"Waveumber of blue light is "2.0833 xx 10^(6) ml` |
|