A detector must receive at least 70% of incident visible light but no more than 10% of incident ultraviolet radiation.
The table shows the percentages of energy transmitted by four screens.
| Screen | Visible transmitted | Ultraviolet transmitted |
|---|---|---|
| P | 80% | 15% |
| Q | 75% | 8% |
| R | 65% | 5% |
| S | 90% | 12% |
Which screen meets both requirements?
screen P
screen Q
screen R
screen S
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.