8 results for “ultraviolet”
The Human Body
Skin, Hair and Nails
ultraviolet light from the Sun and protects the cells beneath from damage. Everyone has about the same
Article · 3 min read
Matter, Energy & Physics
Light
ultraviolet, which tans skin; then X-rays, which pass through flesh but not bone; then gamma
Article · 4 min read
Planet Earth
The Atmosphere
ultraviolet light, the radiation that causes sunburn and skin cancer and would otherwise sterilise the land
Article · 4 min read
Plants & Fungi
Flowers and Pollination
ultraviolet but not red, so flowers that court bees are blue, yellow and purple, often with
Article · 4 min read
Space & the Universe
Nebulae
ultraviolet radiation that strips electrons from the surrounding hydrogen atoms; when the electrons recombine, the atoms
Article · 3 min read
The Human Body
The Senses
ultraviolet, as bees can, hear the ultrasound a bat uses, or sense the magnetic field a bird
Article · 4 min read
Life & Biology
The Origin of Life
ultraviolet light, produced nucleotides and sugars too. Nature does the same chemistry without a laboratory. Meteorites
Article · 4 min read
Animals
Birds
ultraviolet light, which reveals patterns on flowers and feathers invisible to us. Many can sense the Earth
Article · 3 min read
