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More cards in this set
Card 6
Front
Who discovered ultraviolet?
Back
Card 7
Front
How did he discover this?
Back
Card 8
Front
What depends on a waves frequency?
Back
Card 9
Front
What does a higher frequency mean?
Back
Card 10
Front
How are Microwaves harmful to people?
Back
Card 11
Front
How is infra red harmful to people?
Back
Card 12
Front
How is ultraviolet harmful to people?
Back
Card 13
Front
How are gamma rays harmful to people?
Back
Card 14
Front
What are radio waves used for?
Back
Card 15
Front
What do short-wave radio signals do and why?
Back
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