A shopkeeper uses a special security lamp to check if a banknote is genuine by detecting the fluorescent markings printed on it.
Which type of electromagnetic wave does the lamp emit to cause this fluorescence?
infrared
microwave
ultraviolet
X-ray
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.