Flashcards
X-Rays
Flashcards do conjunto (15)
- 1What spectrum are X-Rays a part of and where do they sit?The electromagnetic spectrum and they sit between gamma and UV rays
- 2Do they have a long or short wave length?Short
- 3What do X-Rays cause?Ionisation
- 4Why can X-Rays cause cancer?Because they can knock off electrons from atoms in the body
- 5What can X-Rays be used as a treatment for?Cancer
- 6What 2 substances absorb X-Rays?Bone and metal
- 7How do X-Ray images work?The bone that is thought to be broken is placed on top of the photographic film. X-Rays are emitted and any film that doesn't have bone in front of it will go black but places with bone will stay white. You are able to see the break as it will be black
- 8Do X-rays have a high or low frequency?High
- 9What is the rough size of a X-ray wavelength?About the diameter of an atom
- 10What does CCD stand for?Charge-coupled devices
- 11What are CCDs used for?To form an x-ray electronically
- 12What are CCDs and how do they work?silicone clips that are about the size of a postage stamp. They are split up into grids of millions of identical pixels. The CCD detects x-rays and produce electronic signals what are used to form high resolution images
- 13How are x-rays used to treat cancer?The x-rays are focused on the tumor using a wide beam. The beam is rotated around the patient with the tumor at the center. This minimises the exposure of normal cells to radiation, and so reduces the chances of damaging the rest of the body
- 14What do CT scans produce?High resolution images of hard and soft tissue
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Informações
- Descrição
- GCSE Biology FlashCards sobre X-Rays, criado por francesca graham em 24-04-2016.
- Criado por
- francesca graham · abr 2016
- Atualizado
- 26 abr 2016
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- 12
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