Explanation:
It is given that,
The speed of electromagnetic wave, [tex]v=3\times 10^8\ m/s[/tex]
Frequency of x-ray, [tex]\nu=1.18\times 10^{18}\ m/s[/tex]
We need to find the wavelength of an x - ray. The speed of a wave is given by the product of frequency and the wavelength. It is given by using relation as :
[tex]v=\nu \times \lambda[/tex]
[tex]\lambda=\dfrac{v}{\nu}[/tex]
[tex]\lambda=\dfrac{3\times 10^8\ m/s}{1.18\times 10^{18}}[/tex]
[tex]\lambda=2.54\times 10^{-10}\ m[/tex]
Hence, this is the required solution.
