Question

Can someone please check my answers.

Answer 1

@Michele_Laino ?

Answer 2

@Vincent-Lyon.Fr ?

Answer 3

Can you relate the path travelled to a change in phase?

Answer 4

\[N_{2}-N _{1}=\frac{ L }{ \lambda }(n _{2}-n _{1})\]
Where N is the number of wave lengths in the medium. So the difference of the two numbers will give the phase shift in terms of wavelength. therefore I put the above equation equal to 0.5 and the solved for L.

Answer 5

*then

Answer 6

@Astrophysics ?

Answer 7

@Farcher

Answer 8

It is correct, well done :))
What other values than 0.5 would lead to 2 waves in phase on exit?

Answer 9

1.5

Answer 10

Correct, you've done it :))

Answer 11

Thank you. You've been a great help.