A lamp used in a laboratory to kill bacteria emits ultraviolet radiation with a frequency of 1.2 × 1015 Hz.
The speed of the ultraviolet radiation is 3.0 × 108 m/s.
1 nm=1×10−9 m1\ \text{nm}=1\times10^{-9}\ \text{m}1 nm=1×10−9 m
Calculate the wavelength of the ultraviolet radiation. Give your answer in nanometres.
84 exam-style questions on Edexcel GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves and refraction in glass (core practical), 5.2.2 Groups of the electromagnetic spectrum, 5.2.3 Wavelength-dependent behaviour of EM waves, and 5.2.4 Velocities of EM waves in different substances. Each one has a worked solution and a mark scheme showing where the marks go.