A student researches the three bands of ultraviolet (UV) radiation and compiles the following data:
| UV Radiation Subtype | Wavelength Range | % Energy Absorbed by the Earth's Atmosphere |
|---|---|---|
| UV-A | 400 nm400\text{ nm}400 nm to 315 nm315\text{ nm}315 nm | 5% |
| UV-B | 315 nm315\text{ nm}315 nm to 280 nm280\text{ nm}280 nm | 95% |
| UV-C | 280 nm280\text{ nm}280 nm to 100 nm100\text{ nm}100 nm | 100% |
Using the data in the table, explain why UV-C is potentially the most damaging subtype of ultraviolet radiation to human tissue, but does not present a danger to the population on the Earth's surface.
25 exam-style questions on Edexcel GCSE Physics 5.4 Uses and dangers of EM radiation, covering 5.4.1 Dangers of electromagnetic radiation, 5.4.2 Uses of electromagnetic radiation, 5.4.3 Radio waves and oscillations in circuits, and 5.4.4 Changes in atoms and nuclei generating radiation. Each one has a worked solution and a mark scheme showing where the marks go.