Question

What is the wavelength of UVa, UVb, and UVc light measured in nanometers, and frequency (in Hz)?

Asked by: Richard M. Arnold, B.S.

Answer

According to multiple sources (NASA, FDA, and others) here are the wavelengths of the UVA, UVB and UVC regions:

UVA 400 nm - 320 nm
UVB 320 nm - 290 nm
UVC 290 nm - 100 nm


Note: nm means nanometer (400 nm = 400 x 10-9 meters or 0.0000004 meters)

As far as the frequency is concerned I will let you do the math: frequency = speed of light / wavelength.

You can read more about UVA, UVB and UVC regions of ultraviolet light and their impact on humans by visiting these web sites:

Everything You Ever Wanted to Ask About Ultraviolet Light (NASA)
US FDA (Food and Drug Administration)
HealthLINK (by University of Wisconsin)

Answered by: Anton Skorucak, M.S. Physics, PhysLink.com Creator

Search

Loading


Support Discovery Capsule - Anton's new project on Kickstarter.



Science Quote

'I never worry about the future. It comes soon enough.'

Albert Einstein
(1879-1955)
Science Sidebar | Science Education Articles
Cool Summer Science Projects

Why not make science a part of your family’s summer? Perhaps you can set aside one day a week for outdoor projects—maybe Mad Scientist Monday or Scientific Saturday? Here are a few ideas to help get you started. Continue reading ...

10 Ways to Keep Your Kids Interested In Science

Young children are natural scientists: they ask questions, pick up sticks and bugs outside, and are curious about the world around them. But as they get a bit older, many kids gradually lose their interest in science. They might see it as just another task at school, something that doesn't apply to their lives. Of course nothing could be further from the truth, so here are ten ways you can remind your kids that science is everywhere. Most of these are fun for adults, too! Continue reading ...

Top Selling

Here are our physics & astronomy bestsellers:
Deluxe Water Rocket Set
Magnetic Levitator - Classic
Scorpion, Ant, Wasp and Flower Bug
12 inch Galileo Thermometer
Revolving Multi-Color Fiberoptic Light
Solar Radiometer
Enviro Battery 4M Kit
Tin Can Robot 4M Kit
Wood Grain Newtons Cradle
Brush Robot 4M Kit

Sponsors

USC University of Southern California Dornsife College Physics and Astronomy Department McMaster University Physics and Astronomy Department