Question

http://screencast.com/t/GyzOCm3i

Answer 1

@Vincent-Lyon.Fr

Answer 2

The change in optical path introduced by a plate of thickness e and refractive index n is :

e (n-1)

So you have to compare e (n-1) and e (n'-1) with the second plate.

Answer 3

Never seen that equation before. Does it come in Young's double slit experiment?

Answer 4

Yes, it is a classical development of this type of question.

Answer 5

Okay let me try to do it.

Answer 6

1.75 !!

Answer 7

Ok! Did you solve \(\dfrac{n'-1}{n-1}=\dfrac32\) ?

Answer 8

Yes.

Answer 9

Well done!

Answer 10

Thanks!