Question

The surfaces of rocky planets aren’t perfect black bodies at radio wavelengths. Rocks reflect about 10% of the radio radiation incident upon them. Use this information to improve your estimate the 15 GHz brightness temperature and flux density of Mars.

Answer 1

Answer on Question 55051, Physics / Astronomy | Astrophysics

Question:

The surfaces of rocky planets aren't perfect black bodies at radio wavelengths. Rocks reflect about 10% of the radio radiation incident upon them. Use this information to improve your estimate the 15 GHz brightness temperature and flux density of Mars.

Solution:

Using the equation:

$$T_{b,M} = (1 - r_{\mathrm{c}})T$$ $$T_{b,M} = (1 - 0.1) \times 225\,K = 202\,K$$

Answer: $T_{b,M} = 202\,K$

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