Question: backspace = 3/4 . . odule 6 3 Assignment Booklet A 5. As a safety precaution when working with lasers, scientists wear red-coloured glasses that

 backspace = 3/4 . . odule 6 3 Assignment Booklet A

backspace = 3/4 . . odule 6 3 Assignment Booklet A 5. As a safety precaution when working with lasers, scientists wear red-coloured glasses that will block all colours but red. Why is red light safer than blue light? Why is a red laser safer than a blue laser? 6. A person lives near a 50-KW radio tower. Why is it safe to live near the high-powe radio tower but dangerous to be exposed to an X-ray machine that uses 7.5 kW

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