• Support PF! Buy your school textbooks, materials and every day products via PF Here!

Intensity in Young's double slit experiment problem.

  • Thread starter IrAlien
  • Start date
20
0
Hello all, I have a problem that requires some knowledge about Young's double slit experiment.

The question is as follows:
Imagine performing Young's experiment with one slit wider than the other so that the intensity passing the wider slit is four times as great as that passing the narrower slit. Assume both slits are still 'thin' and act as line sources and show that I = Inaught.(5+4cos(phi))

I do not know where to start... can anyone give me some tips?

Do I use I=4Inaught.[cos(phi/2)^2] ??

Thanks,
Levi
 
You have two sources of electromagnetic waves on a plane. The sources are separated by a given distance. They travel through a given distance through space and illuminate second plane.

What you need to do is find the total amplitude of the two electric fields on the illuminated plane, and then find the irradiance.
 
20
0
Ok thank you for the help. I _think_ I've got it.

Levi
 
8
0
ummm..cant you use Cosine rule to solve this??
 
I'm not sure.

I probably wouldn't use it, but it might be useful.
 
Last edited:

Related Threads for: Intensity in Young's double slit experiment problem.

Replies
2
Views
2K
Replies
8
Views
10K
Replies
1
Views
2K
Replies
44
Views
5K
  • Posted
Replies
1
Views
2K
  • Posted
Replies
1
Views
1K
  • Posted
Replies
1
Views
2K
Replies
1
Views
1K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top