Posts tagged sun
Can you pls elaborate on the 10 degrees and 15 degrees? I don't know geometry or math. How exactly do you hold out your arm against the sun? At what angle to the sun? Illustrations appreciated plea...
I read on https://en.wikipedia.org/w/index.php?title=Sun_protective_clothing&oldid=930941768: A relatively new rating designation for sun protective textiles and clothing is UPF (Ultraviole...
If you had no sunburn cream, would it work to cover your exposed skin in mud and gunk as a crude way to prevent sunburn? I have never tried it. I have tried using paper tissues on my face as a sun ...
This detailed paper https://www.aoa.org/Documents/CRG/Blue%20Light%20and%20Eye%20Damage.pdf from the American Optometric Association details the various types of short term (i.e. snow blindness) an...
With sunblock it's relatively easy to know what to look for in terms of SPF, UV types etc, however with eco-friendly ones that aim to not put chemicals back in the ocean (used by surfers, swimmers,...
Molded kayaks are usually made of polyethylene, an otherwise extremely durable material which can be damaged by the sun. The used market is full of kayaks manufactured ten or twenty years ago whic...
In Biology SE I have just asked Could being exposed to excess UV in the arctic lead to a human eye color change? If so, what is the mechanism? but comments there questioned weather Arctic hiker Rob...
I've only seen parasols being used in movies, cartoons and other artistic media, but extremely rarely in real life. Somehow it feels like I would look ridiculous with one in hand walking around the...
I'm going skiing for the first time. From what I've read, most everyone uses hard shell jackets and pants for skiing. However, they usually mention something about skiing in bad weather, frigid col...
Is there a definite way of approximating the time remaining before sun is set and it starts getting dark? I do understand that there is a time difference between 'Sunset' and the 'moment when it g...
Sometimes due to a high ridge or other land feature, the time that the sun comes over the horizon and gives direct sunlight is different from the time calculated by a sunrise table. From personal ...
According to the answers at Does water in the sun get purified from or polluted by algae, fungi and bacteria? & Can sunlight be used to purify water? water in special containers can be purified...
I'm in the process of designing a more functional "hood" to block UV / sun exposure and also provide shelter from rain. I believe that the best gear and products are developed by "looking to natur...
I live about 45 degree north latitude. Other then at the Equinox, daylight is seldom 12 hours. Sometimes it is more sometimes less. The summer sun can last 16+ hours. I understand how and why th...
After answering this question, I am wondering when it would be useful to cook with a solar stove. It certainly wouldn't make sense in an area that is constantly overcast or when speed is of the es...
Are there any techniques to cooking food camping in the wild by harnessing the sun's energy (rays)? We have all heard of solar panels being used to generate electricity, but are there any techniqu...
We live at 27° latitude, about 200 metres above sea level and drink water from PET bottles laying around on the soil (SODIS method). They are filled with fresh water from a well and reused over and...
