The speed of light changes when it goes from ethyl alcohol (nea = 1.389) to carbon tetrachloride (nct = 1.436). What is the ratio vct vea of the speeds?

Respuesta :

Answer:

[tex]n_{ca}=\frac{v_{ct}}{v_{ea}}[/tex] is the refractive index of ethyl alcohol with respect to carbon tetrachloride.

Explanation:

Given;

refractive index of ethyl alcohol, [tex]n_{ea}=1.389[/tex]

refractive index of carbon tetra-chloride, [tex]n_{ct}=1.436[/tex]

As we know that the refractive index of any medium is given as:

[tex]\rm n_{ea}=\frac{speed\ of\ light\ in\ the\ air}{speed\ of\ light\ in\ the\ medium} =\frac{c}{v_{ea}}[/tex] ........................(1)

&

[tex]n_{ct}=\frac{speed\ of\ light\ in\ the\ air}{speed\ of\ light\ in\ the\ carbon\ tetrachloride} =\frac{c}{v_{ct}}[/tex] ..............................(2)

Now, divide eq. 1 by eq. 2:

[tex]n_{ca}=\frac{c}{v_{ea}} \div \frac{c}{v_{ct}}[/tex]

[tex]n_{ca}=\frac{v_{ct}}{v_{ea}}[/tex] is the refractive index of ethyl alcohol with respect to carbon tetrachloride.

Answer:

The ratio of the velocity of carbon tetra chloride and ethyl alcohol is 0.96.

Explanation:

Given that,

Refractive index of ethyl alcohol n= 1.389

Refractive index of carbon tetra chloride n'= 1.436

We need to calculate the ratio of the velocity of carbon tetra chloride and ethyl alcohol

Using formula of velocity

[tex]\dfrac{v'}{v}=\dfrac{n}{n'}[/tex]

Where, n= refractive index of ethyl alcohol

n'=refractive index of carbon tetra chloride

Put the value into the formula

[tex]\dfrac{v'}{v}=\dfrac{1.389}{1.436}[/tex]

[tex]\dfrac{v'}{v}=\dfrac{1389}{1436}[/tex]

[tex]\dfrac{v'}{v}=0.96[/tex]

Hence, The ratio of the velocity of carbon tetra chloride and ethyl alcohol is 0.96.

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