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abari1 abari1
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12 years ago
1. The speed of light changes when it goes from ethyl alcohol (n = 1.36) to carbon tetrachloride (n = 1.46). The  ratio of the speed in carbon tetrachloride to the speed in ethyl alcohol, v2/v1, is

a. 1.99
b. 1.07
c. 0.932
d. 0.511
e. 0.760

So to work out the problem here is what I did.

n1= ethyl alcohol
n2= carbon tetrachloride

n1 = c/v

v1 = c/n1

n2 = c/v

v2= c/n2

v1 = 2.21e8
v2=2.05e8

v2/v1 = 0.93

is the answer c?
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wrote...
#1
12 years ago
Quote from: abari1 (12 years ago)
1. The speed of light changes when it goes from ethyl alcohol (n = 1.36) to carbon tetrachloride (n = 1.46). The  ratio of the speed in carbon tetrachloride to the speed in ethyl alcohol, v2/v1, is

a. 1.99
b. 1.07
c. 0.932
d. 0.511
e. 0.760

Here's a simple equation n2/n1=v1/v2...so,vct/vea=nea/nct=1.223 divided by 1.595 and thats 0.7667
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