> The reason for this is that the sun is at a low angle, so it hits more of your body than it does when the sun is overhead - like you'd get in Australia. This also means that while you need some sunscreen during the day - from about 10 to 5 - it doesn't burn as much.
Not sure if I parse this correctly - I'd imagine you need more sunscreen at "low angles" due to more severe and longer exposure? Low angle -> more body surface area exposed directly at near-right angle to Sun -> more direct absorption -> more sunscreen needed?
at lower angles the sun light needs to go through a much bigger "cross section" of atmosphere which greatly reduces its energy.
This is why noon sun is the most dangerous.
No, because the sun at low angles passes so much atmosphere, that filters most out.
The exposure angle of your body also has a effect, but much weaker.