- cell phones or smart phones use microwave technology to transmit signals
- 1970s, 11 Motorola engineers developed brain tumour on the left, possibly related to the cell phone signals
- speaker phone, Bluetooth headphones
- Infrared light ------- visible light -------- ultraviolet light
(less energy than UV) R,O,Y,G,I,B, P (source of heat
- infra red camera (rainbow) more energy
(detect heat signal) - after a rainstorm tanning of skin, sunburn
Even more energy, X- ray
- has a lot energy
- can go through your skin, body and see what is inside
- Madam Marie Curie – discovered X-ray, and died from excessive exposure of X-ray
- dentist X ray – lead apron, heavy because the metal lead will absorb the radiation
- chest X-ray: OK once in a while to make sure your lungs are fine, and you don’t have broken bones. You do not Xray everyday
- Gamma Ray – most powerful types of radiation (a lot of energy)
- NASA sends Gamma ray to the universe to locate intelligent life style
- cancer treatments: radiation therapy – gamma ray\
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