Answer:
B. Electromagnetic radiation
Explanation:
Electromagnetic radiation comprises of electric and magnetic field which vary at the same time.
X-ray is an example of an electromagnetic radiation. It consists of extremely short wavelength ranging from about 10−8 to 10−12 metre and high frequency, ranging from about 1016 to 1020 hertz (Hz).
X-ray uses the electromagnetic radiation technique to see below the surface of a work of art.
