What is the Difference Between UVA and UVB Waves?

ULTRAVIOLET WAVES:

THERE ARE TWO DIFFERENT TYPES OF RAYS:

UVA RAYS

• PENETRATE THE DERMIS, THE SKIN'S DEEPEST LAYER
• ULTRAVIOLET IN THE "A" RANGE, 320-400 NANOMETERS

UVB RAYS

• USUALLY ONLY BURN THE SUPERFICIAL LAYERS OF THE SKIN
• IN THE "B" RANGE, 280-320 NANOMETERS

Untitled Slide

• ULTRAVIOLET WAVES RANGE FROM 10-400 NANOMETERS, ABOUT THE SIZE OF A MOLECULE
• THE LONGER THE WAVELENGTH, THE MORE PENETRATING IS THE WAVE OF LIGHT
• THIS IS WHY UVA DOES MORE DAMAGE TO THE HUMAN BODY THAN UVB
• IT'S LONGER THAN AN X-RAY, BUT SHORTER THAN A VISIBLE LIGHT

INTERESTING FACTS

• THE HIGHER THE SPF OF SUNSCREEN, THE MORE PROTECTION AGAINST RAYS
• THEY ARE PRESENT IN SUNLIGHT
• THEY GIVE THE HUMAN BODY VITAMIN D

SOURCES

• SCIENCECELEARN.ORG.NZ
• WWW.COOLASUNCARE.COM/SUNSCIENCE/UVA-VSUVB
• EN.M.WIKIPEDIA.ORG/WIKI/ULTRAVIOLET

THE END!!!!