Visible light has a frequency of approximately 5.0 × 1014 Hz. Radiation X X\,X and radiation Y Y\,Y are two other types of electromagnetic radiation. The frequency of X X\,X is 1.5 × 1013 Hz, and the frequency of Y Y\,Y is 2.5 × 1018 Hz. Which types of radiation are X X\,X and YYY?
XXX is infra-red and YYY is X-rays.
XXX is microwave and YYY is ultraviolet.
XXX is infra-red and YYY is radio waves.
XXX is ultraviolet and YYY is X-rays.
198 exam-style questions on CIE IGCSE Physics Electromagnetic spectrum, covering Electromagnetic spectrum. Each one has a worked solution and a mark scheme showing where the marks go.