Reflection and phase difference

[uzman1243]

Homework Statement

Hi,
This is not a homework question. I have my exam for my physics unit tomorrow. I am pretty set for it except for questions of this type. Can you please show me how I can get the answer?

Thanks

[/B]

Homework Equations

N/A

The Attempt at a Solution

N/A

 

[berkeman]

Homework Statement

Hi,
This is not a homework question. I have my exam for my physics unit tomorrow. I am pretty set for it except for questions of this type. Can you please show me how I can get the answer?

Thanks

[/B]

Homework Equations

N/A

The Attempt at a Solution

N/A

Even if it is a study question for an exam, the PF Homework Help rules still apply. You must show the Relevant Equations (yes there are some), and shnow your Attemp at a Solution. This is pretty straightforward if you show some effort on it, IMO.

 

[uzman1243]

Even if it is a study question for an exam, the PF Homework Help rules still apply. You must show the Relevant Equations (yes there are some), and shnow your Attemp at a Solution. This is pretty straightforward if you show some effort on it, IMO.

That;s the problem. I don't know what equations to use here.