2nd Edition

ISBN: 9781260263213

Author: sobecki

Publisher: MCG

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Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative p…

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Chapter 1.7, Problem 2G

A fun fact: You can use a microwave oven and a bar of chocolate to measure the speed of light. Really! Microwaves are electromagnetic waves, just like visible light. The difference is the wavelength of these waves: For visible light, the wavelengths are in the neighborhood of 10 − 6 m, while microwaves are close to 10 − 2 m. Basically, microwaves emitted in an oven make molecules in food vibrate, which causes heat. The first places to heat up are separated by half of a wavelength, so by using something that starts to melt visibly in certain spots, we can calculate the wavelength. We can then use that to calculate the speed of light, which I think we can all agree is pretty darn cool.

If your teacher is unusually adventurous, he or she might bring in a microwave and chocolate bars, in which case you can perform the experiment on your own. Start with around 20 seconds, and make sure you take out the carousel: The chocolate has to stay stationary. (And now you know why a lot of microwaves have a carousel: Food heats more thoroughly at the spots corresponding to half of the wavelength.)

In case no microwave and chocolate are available, I did the experiment at home and took a picture for you, which is reproduced below. It’s a life-size scale, so you can measure the distance between the melted spots with a ruler.

Chapter 1.7, Problem 2G, A fun fact: You can use a microwave oven and a bar of chocolate to measure the speed of light.

Convert the half-wavelength to meters. (Think about what the prefix “centi” means!) Distance : _ _ _ _ _ _ _ _ _ _ m

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Chapter 1.7, Problem 1G

Chapter 1.7, Problem 3G

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Solution Summary: The author explains the converted half-wavelength in meters in the statement "Distance: _____ m".

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