X-rays are typically used in hospitals
X-rays are high frequency, short wavelength electromagnetic waves. Their wavelength is roughly the same size as the diameter of an atom.
They are transmitted by (pass through) healthy tissue and are absorbed by denser material like bone or metal.
They are affected by photographic material in the same way as light so they can be used to take photos. X-rays can be used to identify health problems such as bone fractures or breaks or dental problems such as broken teeth.
X-ray images can be used to form images using charged coupled devices which are silicon chips about the same size of a postage stamp and are made up of a grid of millions of identical pixels. CCD's (Charged Coupled Devices)can detect and produce X-rays and capture a digital image in a high resolution similar to the technology used in digital cameras.
In an X-ray image the brighter parts of the image are where fewer X-rays have been absorbed. This is known as a negative image. The plate of the image starts off all white.
Comments
No comments have yet been made