Which of the following pairs is NOT part of the electromagnetic spectrum? I. Radio waves II. Beta rays III. Gamma rays IV. Alpha rays

Which of the following pairs is NOT part of the electromagnetic spectrum? 

I. Radio waves

II. Beta rays

III. Gamma rays

IV. Alpha rays

Answer Details

The pair that is NOT part of the electromagnetic spectrum is IV. Alpha rays. The electromagnetic spectrum includes different types of electromagnetic radiation, such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. Alpha rays are not part of this spectrum, but are instead a type of particulate radiation made up of helium ions. So the correct answer is "II and IV".