Albedo is reflected power over incident power, here reflected is 40, incident is 100, hence 0.4.
CloseFor this, we need to use the equation \(L = \frac{Q}{m}\), so we have \(Q = 0.25 \cdot 3 \cdot 10^5\), which results in A.
CloseGlobal dimming is the process in which the amount of sunlight reaching the Earth's surface is decreasing due to the polluting particles in the atmosphere reflecting it.
CloseWith the albedo formula, we can calculate the reflected intensity, which is 350 Wm-2. However, the question is asking for the absorbed intensity; hence, we must subtract this from 500, giving 150.
Close\[ P = \varepsilon \sigma A T^4 = 0,85 \cdot 5.67 \cdot 10^{-8} \cdot 4\pi (0.5)^2\cdot 300^4 \]
Close\[ \text{Absorbed Energy} = (1 - \text{Albedo}) \cdot \text{Incident Radiation} \]
\[ \text{Absorbed Energy} = (1 - 0.3) \cdot 1.0 \cdot 10^3 = 0.7 \cdot 10^3 = 700 \, \mathrm{W/m^2} \]
CloseRadiation with wavelengths in the range \(0.7 \, \mu\mathrm{m}\) to \(1 \, \mathrm{mm}\) belongs to the infrared part of the electromagnetic spectrum.
Close\[ P_{\text{net}} = \varepsilon \sigma A (T_1^4 - T_2^4) \]
\[ P_{\text{net}} = 0.9 \times 5.67 \times 10^{-8} \times 2.0 \times \left((320)^4 - (300)^4\right) \]
\[ P_{\text{net}} = 0.9 \times 5.67 \times 10^{-8} \times 2.0 \times (1.05 \times 10^{10} - 8.1 \times 10^9) \]
\[ P_{\text{net}} = 0.9 \times 5.67 \times 10^{-8} \times 2.0 \times 2.4 \times 10^9 \approx 245 \, \mathrm{W} \]
Close