A student says:
'X-rays travel through space faster than radio waves, because X-rays carry more energy.'
Which statement about the student's idea is correct?
The student is correct, because waves with a higher frequency travel faster
The student is wrong, because radio waves have longer wavelengths so travel faster
The student is correct, because X-rays are ionising and radio waves are not
The student is wrong, because all electromagnetic waves have the same speed in space
48 exam-style questions on OCR GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves in space, 5.2.2 Energy transfer by electromagnetic waves, 5.2.3 Frequency and wavelength across the spectrum, 5.2.4 Groups of the electromagnetic spectrum, 5.2.5 Visible light and the limits of human sight, 5.2.6 Light as an electromagnetic wave, 5.2.7 Uses of electromagnetic waves, 5.2.8 Hazards of ultraviolet, X-rays and gamma rays, 5.2.9 Ultrasound and imaging inside the body, and 5.2.10 Radio waves and oscillating circuits. Each one has a worked solution and a mark scheme showing where the marks go.