I always hear that we should avoid the sun or make sure to put on sunscreen in the afternoon when the sun is the most intense. Why is the sun’s rays more harmful when it is directly overhead vs in the morning soon after sunrise? Either way, the sun is shining directly on me so not sure what causes the difference in intensity.
In: Planetary Science
Distance from the Sun to you + possibly percentage of the Sun’s UV rays that can reach you.
For example, if you’re out at dawn when the Sun partially appears, more of the UV rays get blocked/attenuated by various things other than air and the rest have to travel longer to you compared to midday.
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