what is the velocity of the light in a glass with an index of refraction of 1.38

Discussion in 'Physics' started by AshokKandwal, Jan 20, 2009.

  1. AshokKandwal

    Thread Starter New Member

    Jan 20, 2009
    3
    0
    :)what is the velocity of the light in a glass with an index of refraction of 1.38
     
  2. leftyretro

    Active Member

    Nov 25, 2008
    394
    2
    The reciprocal of 1.38 ?

    Lefty
     
  3. fanta_hanu

    New Member

    Mar 9, 2009
    8
    0
    refractive index = 1.38(glass)

    refractive index = velocity of light in vaccum/velocity of light in medium


    Velocity of light in vaccum = 3810^8 met/sec
    --> 1.38 = 3*(10)8 / V

    --> V= 3*(10)8/ 1.38

    --> V = 21.73 * (10)7 met/sec


    Hope its clear now..

    cheers,
    Hanu
     
  4. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    The Forum has TeX formatting with "Click and Write" functionality built in. In the editor, It is the Sigma at the left of the button bar: Ʃ

    Using TeX, The above equations are much more readable, simply quote this post to see the codes used.

    <br />
c \approx 3 \times 10^{8} \frac{m}{sec}<br />

    <br />
R_{i} = \frac {c}{V}<br />

    <br />
1.38 = \frac {3 \times 10^{8}} {V}<br />

    <br />
V \approx \frac {3\times 10^{8}}{1.38}<br />

    <br />
V \approx 21.73\times 10^{7}\frac {m}{sec}<br />
     
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