- #1

snowcrystal42

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Hi,

I'm doing a very simple problem, but I don't understand the diagram provided (see image below).

What is

I know that

Suppose the interference pattern shown in the figure is produced by monochromatic light passing through two slits, with a separation of 161 μm, and onto a screen 1.32 m away. What is the wavelength of light?

tanθ = y/L

tanθ = (23mm)/(1.32m)

θ = 0.998°

λ = (dsinθ)/m = [(161μm)(sin(0.998))]/m

Thanks!

I'm doing a very simple problem, but I don't understand the diagram provided (see image below).

What is

*m*here?I know that

*m*is the order with respect to the central bright fringe, but there isn't a central bright fringe (assuming those circles are the bright fringes)?## Homework Statement

Suppose the interference pattern shown in the figure is produced by monochromatic light passing through two slits, with a separation of 161 μm, and onto a screen 1.32 m away. What is the wavelength of light?

## Homework Equations

*d*sinθ = mλ (m = 0,1,2,3...) for constructive interference*d*sinθ = (m + ½)λ (m = 0,1,2,3...) for destructive interferencetanθ = y/L

## The Attempt at a Solution

tanθ = (23mm)/(1.32m)

θ = 0.998°

λ = (dsinθ)/m = [(161μm)(sin(0.998))]/m

Thanks!