Satellite radar remote sensing systems use different microwave frequency bands to observe forested regions.
Table 1 shows the frequency ranges for three microwave bands commonly used in radar observations: C-band, S-band, and L-band.
Table 1
| Microwave Band | Frequency range (Hz) |
|---|---|
| C-band | 4.0 × 109 to 8.0 × 109 |
| S-band | 2.0 × 109 to 4.0 × 109 |
| L-band | 1.0 × 109 to 2.0 × 109 |
Figure 1 shows how radar signals from these different bands penetrate the layers of a dense forest canopy.
Describe how the penetration of microwave radiation into the forest layers changes with wavelength, using information from Table 1 and Figure 1.
Calculations are not required.
The electromagnetic spectrum Questions
Practise Edexcel GCSE Physics The electromagnetic spectrum with exam-style questions for Foundation and Higher tier. 32 questions, matched to the Edexcel GCSE Physics (1PH0) 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.