UV icon.
STUDENTS: Module 1: Science in the Personal & Social Perspectives
You & Me & UV

• You & Me & UV -Investigates UV radiation and some of its potential effects on human health.
Wavelength is the distance between crests or the successive highest points of a wave.

Frequency is the number of wave crests that pass a given point per second and is usually expressed as “cycles per second” or Hertz (Hz).

Electromagnetic Spectrum.

The Electromagnetic Spectrum

The Electromagnetic Spectrum adapted from NASA: Radio, Microwave, Infrared, Visible, Ultraviolet, X-ray, Gamma

Looking at the electromagnetic spectrum chart on the next page, you will find UV radiation between visible light and X-rays. In terms of energy, the higher the frequency, the higher the energy; therefore, UV radiation is on the higher energy end of the electromagnetic spectrum.

There are three types of UV radiation identified within the 100 to 400 nm range. They are:

UV A - 330-400 NM - causes aging, wrinkling, and loss of elasticity of skin

UV B - 290-330 NM - causes the greatest risk of skin cancer

UV C - 100-290 NM - very destructive to tissues, however most is absorbed by the Earth’s atmosphere before reaching ground level

Prolonged and direct exposure to the sun means more exposure to damaging UV radiation.

Our gang at the beach.

 


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Dr. Gary Noel Ross
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• Dennis Smith

 

Print to complete:

W I R N E E R C S N U S Y P
A T E A H T G N E L E V A W
S G C L V D H X T E H J R A
Y C N E U Q E R F H S Q - B
P H A K P B A B I P G C X U
I P C G A V C M U K Q I K Y
T O O L I B W M A Y N P L F
F L P O E N F R T F E S C H
T R L A T Y G D C V S F A T
I E W H Z D B F X B U K A G
T O N N B K G U Z V N A V G

ultraviolet
wavelength
frequency
sun
light
x-ray
cancer
aging
sunscreen

 

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