## Related questions with answers

The intensity of solar radiation at the top of the Earth’s atmosphere is 1 370 W/m2. Assuming 60% of the incoming solar energy reaches the Earth’s surface and you absorb 50% of the incident energy, make an order-of-magnitude estimate of the amount of solar energy you absorb if you sunbathe for 60 minutes.

Solution

Verified$\textbf{Given}$

The intensity of solar radiation at the top of the Earth's atmosphere $I$ is

$\begin{align*} I=1370\ \frac{\text{W}}{\text{m}^2} \end{align*}$

The percentage of the incoming solar energy that reaches the Earth's surface $k$ is

$\begin{align*} k=0.6 \end{align*}$

The percentage of the incident energy that a person absorbs $n$ is

$\begin{align*} n=0.5 \end{align*}$

The time interval $t$ during which we consider the absorption of the energy is

$\begin{align*} t=60\ \text{min} \end{align*}$

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