WEBVTT - How X-Ray Machines Work

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<v Speaker 1>Welcome to brain Stuff from how stuff works dot com.

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<v Speaker 1>We're Smart Happens Hi, I'm Marshall Brain. We take X

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<v Speaker 1>rays at the doctor's office for granted, but they really

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<v Speaker 1>are pretty amazing. The idea of being able to see

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<v Speaker 1>through the human body is pretty cool. And X ray

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<v Speaker 1>machine is essentially a camera, but instead of visible light,

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<v Speaker 1>it uses X rays to expose the film. X rays

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<v Speaker 1>are like light in that they are electromagnetic waves, but

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<v Speaker 1>there are a lot more energetic than light waves, so

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<v Speaker 1>X rays can penetrate many materials to varying degrees. When

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<v Speaker 1>the X rays hit the film, they expose it just

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<v Speaker 1>as lightwood. Since bone, fat, muscle, tumors, and other masses

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<v Speaker 1>inside the body all absorb X rays at different levels,

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<v Speaker 1>the image on the film lets you see different structures

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<v Speaker 1>inside the body because of the different levels of exposure

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<v Speaker 1>on the film. Do you have any ideas or suggestions

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