A student finds a table showing data for different ultraviolet (UV) radiation bands:
| Radiation Band | Wavelength Range | % Energy Absorbed by the Earth's Atmosphere |
|---|---|---|
| Near UV | 400 nm400\text{ nm}400 nm to 300 nm300\text{ nm}300 nm | 10% |
| Middle UV | 300 nm300\text{ nm}300 nm to 200 nm200\text{ nm}200 nm | 90% |
| Far UV | 200 nm200\text{ nm}200 nm to 10 nm10 \text{ nm}10 nm | 100% |
Using the data in the table, explain why Far UV is potentially the most dangerous type of ultraviolet radiation to human cells, but does not pose a risk to people on the Earth's surface.
25 exam-style questions on Edexcel GCSE Physics 5.4 Uses and dangers of EM radiation. Each one has a worked solution and a mark scheme showing where the marks go.