Physics A-Level
Emission
What Emission means in Physics A-Level, as defined for OCR.
Definition of Emission
Check what you remember
Read the wording for your board, then hide it and explain Emission in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
An alternating potential difference is applied across the crystal, causing it to vibrate at the driving frequency and produce ultrasound.
Topics that use Emission
- Using ultrasound (OCR A-Level)
Related terms
- A-scan
- Acoustic impedance
- Acoustic impedance mismatch
- Acoustic matching
- Angle dependence of Doppler shift
- B-scan
- Coupling gel
- Coupling gel in ultrasound scanning
Using Emission in the exam
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