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X-Rays in Medicine:
-Used for medical diagnosis
-HIGH FREQUENCY SHORTWAVELENGTH ELECTROMAGNETIC WAVES
-Transmitted through healthy tissue Absorbed by bones (denser material)
-Diagnose bone fractures or dental problems
-Can be formed electronically using charge couple device CCD's

CCD's:
-Small silicone chips divided into grid of millions of identical pixels which…

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Ultrasound: A sound wave with a HIGHER FREQUENCY than we can hear
-Electrical systems can be made to produce electrical oscillations of any frequency, these can then be turned into mechanical vibrations; creating
sound waves of a higher frequency than the upper limit of human hearing

Ultrasound Waves can…

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-Can be used to investigate blood flow, diagnose heart problems and check fetal development

Breaking Down Kidney Stones:
-Kidney stones Hard masses that block the urine tact
-A ultrasound beam is concentrates high energy waves at the stones Stone turn to sand and pass out urine
-Advantages are that's…

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Refractive Index: of a medium is the ratio of speed of light in a vacuum to speed of light in that medium. All transparent materials have a refractive
index.

Refraction: Waves CHANGE DIRECTION when they enter a DIFFERENT MEDIUM because the wave CHANGES SPEED after entering a DIFFERENT
DENSITY…

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2)An incident ray passing through the focal point refracts through the lens and travels parallel to the axis
3)An incident ray travelling along the axis carries on in the same direction

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Concave Diverging Lenses:
-Causes parallel rays of light to DIVERGE (SPREAD OUT)
-The FOCAL POINT of a diverging lens is WHERE ALL THE RAYS OF LIGHT APPEAR TO BE COMING FROM ALONG THE AXIS BEHIND THE LENS

The 3 Rules about Refraction in a Concave Lens:
1) An incident…

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Ray Diagrams for DIVERGING LENSES:

Comments

cherrypoo

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Thanks - these notes are a great help! 5 stars!

Mariam

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@cherrypoo Thats great to hear -Your welcome and thanks for the awesome rating

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