A shopkeeper uses a security lamp to check if a banknote is genuine. The security markings on a real banknote fluoresce (glow) when exposed to the radiation from this lamp.
Which type of electromagnetic wave does the lamp emit to cause this fluorescence?
infrared
microwave
radio waves
ultraviolet
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.