1. Jun 6, 2014

### elementozzy

So I got a warning for just posting questions so I'll do as best as I can to try and put effort lol

1. The problem statement, all variables and given/known data

A Young's interference experiment is performed with monochromatic light. The separation between the slits, d, is .50 mm, and the interference
pattern on a screen L = 3.3 m away shows the first maximum y1 = 3.4 mm from the center of the pattern. What is the wavelength?

GIVEN DATA

d=.50mm

L=3.3m

y1= 3.4mm

2. Relevant equations

Yn=(nλL)/d

3. The attempt at a solution

I need to know if I'm attempting this right.

I started off by plugging in y1=3.4mm, L=3.3m and d=.50mm

Pretty simple.
3.4=(nλ3.3)/.5

1.7=(nλ3.3)

.5151.....=λ

???

Am I right by plugging in 1 for n???

2. Jun 6, 2014

### dauto

Quoting from the text you provided "first maximum y1 = 3.4 mm".

3. Jun 6, 2014

### elementozzy

So..... Am I right?

4. Jun 6, 2014

### dauto

Do you need to ask? the formula given is for yn, you were given y1, what do you think n is?

5. Jun 8, 2014

### elementozzy

Oh I just needed to make sure. So yn(subscript), whatever is in the subscript is just n?