Query 20

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course Phy 122

3/3 1728hrs

If your solution to stated problem does not match the given solution, you should self-critique per instructions at http://vhcc2.vhcc.edu/dsmith/geninfo/labrynth_created_fall_05/levl1_22/levl2_81/file3_259.htm.

Your solution, attempt at solution. If you are unable to attempt a solution, give a phrase-by-phrase interpretation of the problem along with a statement of what you do or do not understand about it. This response should be given, based on the work you did in completing the assignment, before you look at the given solution.

020. `Query 18

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Question: `qPrinciples of Physics and General Physics Problem 24.14: By what percent does the speed of red light exceed that of violet light in flint glass?

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Your solution:

Going off of figure 24-14 on page 686 and getting the refractive index from silicate flint glass and Borate flint glass, I would say the percent is as follows:

1.665/1.175 = 1.0294 * 100 = 102.94 = 2.94% for Silicate flint glass,

1.59/1.57 = 1.0192 *100 = 101.92 = 1.92% for Borate flint glass.

confidence rating #$&*:

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Given Solution:

`aThe respective indices of refraction for violet and red light in flint glass appear from the given graph to be about 1.665 and 1.620.

The speed of light in a medium is inversely proportional to the index of refraction of that medium, so the ratio of the speed of red to violet light is the inverse 1.665 / 1.62 of the ratio of the indices of refraction (red to violet). This ratio is about 1.028, or 102.8%. So the precent difference is about 2.8%.

It would also be possible to figure out the actual speeds of light, which would be c / n_red and c / n_violet, then divide the two speeds; however since c is the same in both cases the ratio would end up being c / n_red / ( c / n_violet) = c / n_red * n_violet / c = n_violet / n_red, and the result would be the same as that given above.

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Self-critique (if necessary): Close, reading the chart can be a little subjective I guess.

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Self-critique Rating:3

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Self-critique (if necessary):

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Self-critique rating:

&#Your work looks good. Let me know if you have any questions. &#