41602
Beschreibung
Mindmap von chattyshannon, aktualisiert more than 1 year ago
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Erstellt von chattyshannon
vor mehr als 11 Jahre
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Medical Applications
- X-rays
- Part of the electromagnetic
spectrum, short wavelength and
cause ionisation.
- Precautions need to be taken.
- Precautions need to be taken.
- Are used to diagnose and treat
some conditions.
- CT scans, bone
fractures, dental
problems and
killing cancer cells.
- CT scans, bone
fractures, dental
problems and
killing cancer cells.
- They are absorbed by bone and metal, but
transmitted by healthy tissue.
- Part of the electromagnetic
spectrum, short wavelength and
cause ionisation.
- Ultrasound
- Systems produce ultrasound waves, which have a
frequency higher than what the human ear can hear.
- 20Hz to 20,000Hz
- 20Hz to 20,000Hz
- Waves are partially reflected when they
meet a boundary between two different
media.
- The time taken can be used to work
out the distance.
- The time taken can be used to work
out the distance.
- Distance = speed * time
- s = v * t
- s = v * t
- Examples are
pre-natal scans
and removing
kidney stones.
- Systems produce ultrasound waves, which have a
frequency higher than what the human ear can hear.
- Lenses
Anmerkungen:
- [Image: http://hyperphysics.phy-astr.gsu.edu/hbase/geoopt/imggo/focalength.gif]
- Refraction is the change of
direction of light.
- A lens forms an image by refracting light.
- A lens forms an image by refracting light.
- Distance from lens to the
focal point is the focal length.
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