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A level Physics - OCR A (New spec.) > Medical Physics > Flashcards

Flashcards in Medical Physics Deck (6)
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1

How do X-rays interact w/ matter via the photoelectric effect?

Where an orbital electron is ejected from an atom due to energy gained from incident photon

2

How do X-rays interact w/ matter via Compton Scattering?

Where x-ray is scattered via interaction with an orbital electron

3

How do X-rays interact w/ matter via pair production?

Where-ray photon interacts with the nucleus of an atom and an electron and positron are produced

4

Acoustic Impedance

Product of speed of sound in material and density of material

5

Ultrasound

Longitudinal Waves with frequency greater than 20kHz

6

Piezoelectric effect

An application of a p.d. across a material / crystal causes an expansion /contraction / vibration