Which rays produce sun tan
Computer tan hoax website recalibrates the user's computer monitor or mobile phone to produce ultraviolet rays, after promising to give the user a skin analysis. Described as a "revolutionary new online tanning service" that promises an all-year tan, upon activating the "five-minute free tan trial", bars from a sunbed flash on the screen followed by the message "Don't be fooled, UV exposure can kill", and then by images depicting the victims of sun damage. The advertisement was shown on 75 screens in 11 stations on the London Underground, where it was projected to be seen by up to 1.7 million commuters. It was
Anticrepuscular rays is actually an optical illusion. The rays are in fact almost parallel, and their apparent convergence is toward a vanishing point, which is an infinite distance away from the viewer. Anticrepuscular rays Anticrepuscular rays, or antisolar rays, are atmospheric optical phenomena similar to crepuscular rays, but appear opposite of the Sun in the sky. Anticrepuscular rays are nearly parallel, but appear to converge toward the antisolar point due to linear perspective. Anticrepuscular rays are most frequently visible around sunrise or sunset. Appearing to radiate from the Sun, crepuscular rays usually look much brighter than anticrepuscular rays. This is because the