Find wavelength of electromagnetic waves of frequency `5 xx 10^(19)Hz` in free space. Give its two applications.

Explanation

We are given: `v= 5 xx 10^(19)Hz`
We are to calculate, wavelength `lamda`
Using relation: `c= v lamda, rArr` We have, `lamda = (c )/(v)= (3 xx 10^(8))/(5 xx 10^(19))=6 xx 10^(-12)m` These are Gamma rays
Applications: (i) `gamma`-rays are used to get information regarding structure of atomic nuclei. (ii) `gamma`- rays are used for detection purposes.