Which one of the following pairs of rays is electromagnetic in nature?

CONCEPT:

• Alpha rays: Alpha ray, also called alpha particles alpha ray, contains two protons and two neutrons bound together into a particle just like a helium-4 nucleus.
• Beta rays: Beta rays, also called beta particles or beta radiation, maybe a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.
• Cathode rays: Cathode rays are streams of electrons observed in discharge tubes. A vacuum glass tube is provided with two electrodes and a voltage is applied, glass behind the positive electrode is observed to glow, due to electrons particles emitted from the cathode.
• X-rays: A sort of high-energy electromagnetic wave. X-rays features a wavelength starting from 0.1 to 10 nanometers.
• Gamma rays: A gamma-ray, or gamma radiation, is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.

EXPLANATION:

• As X-rays and Gamma rays are electromagnetic in nature so option 4 is correct.