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Suppose you want to take a chest x-ray with an x-ray source that has a divergence of 1 degrees. If the film is 1 meters from the (point) source, how big is the film in centimeter s?

Question

Suppose you want to take a chest x-ray with an x-ray source that has a divergence of 1 degrees. If the film is 1 meters from the (point) source, how big is the film in centimeter s? 

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Step 1

The description is as shown in the diagram.

D
d
о
0/2
В
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D d о 0/2 В

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Step 2

Here, d is the source-screen distance, ϴ is the divergence angle and D is...

ө
tan
2
2
ө
D 2d tan
2
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ө tan 2 2 ө D 2d tan 2

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