L19_18Feb_posted

L19_18Feb_posted - Housekeeping Monday is a holiday I will...

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1 Reflection Refraction 2 Housekeeping Monday is a holiday. I will have office hours on Wednesday 2/23 from 11:00-12:30 ! my office (ISB 269) Review session for Midterm 2 -- Sunday 2/27 1:00-3:00pm Sample questions will be posted shortly 3 The electromagnetic spectrum “White” light contains a mixture of colors… ! similar to that in sunlight. But our eyes are insensitive to most of the electromagnetic spectrum . 4 Infrared radiation Discovered in 1800 by William Herschel. .. Shining sunlight through a prism he found evidence for radiation he couldn’t see… We feel infrared radiation as heat. Direct experimental evidence of the connection of radiation and electromagnetism came with radio waves…
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5 Radio waves in 1888 Henrich Hertz produced radio waves in his laboratory… This is just an experiment that proves Maestro Maxwell was right, we just have these mysterious electromagnetic waves that we cannot see with the naked eye. But they are there… It's of no [practical] use whatsoever . -- Hertz, answering a student
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L19_18Feb_posted - Housekeeping Monday is a holiday I will...

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