Gamma rays from outside the body can damage internal organs. Ultraviolet from the Sun mainly damages the skin and eyes.
Which statement explains this difference?
Gamma rays have a lower frequency, so they pass through the skin without ionising it
Gamma rays are very penetrating and reach internal organs, while UV is absorbed by skin
Ultraviolet travels more slowly than gamma rays, so it cannot reach internal organs
Ultraviolet has a higher frequency than gamma rays, so it is absorbed more by skin
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.