Ray tracing calculates how rays of light reflect and scatter off different surfaces. Path tracing follows the entire journey, ...

Both UVA and UVB rays can damage your skin, just in different ways. One causes premature aging, the other is more prone to causing sunburn, DNA damage, and skin cancer.

Sunscreen protects you from premature aging and skin cancer by absorbing the sun's UV rays. Learn about sun protection, including tips.

The shape on the horizon that Maricarmen Khalaf could see from a ferry travelling from Nanaimo to Horseshoe Bay looked like a ghost ship in the Strait of Georgia. Unsure what it was, she took a video ...

Grades 9-12 Learn about the cause of sunburns, in this video from NOVA’s Gross Science series. Sunlight is made up of many ...

Abstract: A rigorous theory for solving general 3-D photonic crystal refraction problem is developed. The power flow direction and transmission intensity of each mode refracted at a periodic surface ...