Table 1 shows the lower and upper wavelength limits of infrared radiation blocked by three different optical filters used in thermal imaging.
| Infrared Filter | Lower Wavelength Limit | Upper Wavelength Limit |
|---|---|---|
| Filter A | 950 nm950\text{ nm}950 nm | 1950 nm1950\text{ nm}1950 nm |
| Filter B | 1.95 μm1.95\ \mu\text{m}1.95 μm | 3.05 μm3.05\ \mu\text{m}3.05 μm |
| Filter C | 3050 nm3050\text{ nm}3050 nm | 4000 nm4000\text{ nm}4000 nm |
Determine which optical filter blocks the largest range of wavelengths of infrared radiation.
To gain full marks, you must show your working by calculating the range of wavelengths blocked by each filter in a consistent unit.
Practise AQA GCSE Physics Black body radiation (physics only) with exam-style questions for Foundation and Higher tier. 9 questions covering Emission and absorption of infrared radiation and Perfect black bodies and radiation, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.