Question

The speed of light in diamond is 125000kms^-1.What is the refractive index?
@ganeshie8

Answer 1

@Directrix

Answer 2

a mew b=Ca/Cb

Answer 3

ca/cb?????????????
what??????????

Answer 4

a mew b=refractive index of the medium b with respect the medium a

Answer 5

Ca=light velocity in a medium a

Answer 6

Cb=light velocity in medium b

Answer 7

a=free space
b=diamond

Answer 8

Would this help?

Refractive index of diamond= Speed of light in vacuum or air/ Speed of light in diamond

Answer 9

@Directrix

Answer 10

0 mew b=C0/Cb=3*10^8/125000000=?

Answer 11

Once you know that concept, you can then apply it:
Refractive index of diamond= Speed of light in vacuum or air/ Speed of light in diamond
V(air)/V(diamond) = 3x10^8/1.25x10^8 = 2.4 as your final answer.

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Answer 12

"0 mew b=C0/Cb=3*10^8/125000000=?"
125000 it had only 3 zeros?

Answer 13

???????????????????????????????????????????????????????????????????????

Answer 14

@Directrix

Answer 15

Do you agree that:
Refractive index of diamond= Speed of light in vacuum or air/ Speed of light in diamond

Answer 16

It's just a definition. its useful because we can look up the refractive index and then know the speed of light through the medium (here a diamond)

Answer 17

?

Answer 18

@perl

Answer 19

@ganeshie8

Answer 20

basically, light slows down when it goes through a diamond. when you see the 'speed of light' that is the speed of light in a vacuum

Answer 21

speed of light in a vacuum:
$$\Large c = 2.99792458 \times 10^8 m/s $$
most books round this to
$$\Large c = 3.00 \times 10^8 m/s $$

Answer 22

ok so far?

Answer 23

yes.

Answer 24

@perl