Find the wavelength of electromagnetic waves of frequency `5xx10^(19)` Hz in free space. Where is this type of wave used ?

Explanation

`lambda=(c/v=(3xx10^(8))/(5xx10^(19))=6xx10^(-12)m)`
`=6xx10^(-12)xx10^(10)=0.06"Å"`
It is hard X -ray -used in the treatment of cancer -affected cells , or in the detection of internal defects of metals.