Double Slit Interference Pattern: Width and Color Effects - Prof. David Collins, Study notes of Physics

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Phys 132 Spring 2009

Double Slit Pattern

Double

slit

interference

pattern for two

slits

of

negligible width.

I

I

max

cos

2

β

where

β

πd

λ

sin

θ.

θ

Intensity

TEX

Phys 132 Spring 2009

Single Slit Pattern

Single

slit

interference

pattern.

I

I

max

sin

α

α

2

where

α

πa

λ

sin

θ.

θ

Intensity

TEX

Phys 132 Spring 2009

Double Slit Pattern: Width Included

Double

slit

interference

pattern

including

width

features. I

I

max

sin

α

α

2

cos

2

β

where

α

πa

λ

sin

θ

and

β

πd

λ

sin

θ.

θ

TEX

Phys 132 Spring 2009

Double Slit Pattern: Narrower Width

Double

slit

interference

pattern

with

a

narrower

width. I

I

max

sin

α

α

2

cos

2

β

where

α

πa

λ

sin

θ

and

β

πd

λ

sin

θ.

θ

TEX