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Double Plate Interference

Module by: Paul Padley. E-mail the author

Summary: We explain double plate interference

Double Plate Interference

Figure 1
Figure 1 (Double-Plate-Interference.jpg)

Assume that the normally incident light bounces off the bottom of the top glass and the top of the bottom glass. In this case there is a phase change between the two cases and the conditions of constructive and destructive interference flip.

So constructive interference occurs when 2 d = n λ / 2    n = 1 , 3 , 5 … 2 d = n λ / 2    n = 1 , 3 , 5 … 2 x α = n λ / 2 2 x α = n λ / 2 or the position of the maxima are x m a x = n λ 4 α   n = 1 , 3 , 5 … x m a x = n λ 4 α   n = 1 , 3 , 5 …

Destructive interference will occur at 2 d = n λ   n = 1 , 2 , 3 , … 2 d = n λ   n = 1 , 2 , 3 , … x m i n = n λ 2 α   n = 1 , 2 , 3 … x m i n = n λ 2 α   n = 1 , 2 , 3 …

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Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

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Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

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| External bookmarks