Physics U/V 0.0 / 5 ? PhysicsKeywordsGCSEAQA Created by: Atlanta and JacobCreated on: 21-11-16 17:56 Ultrasound wave Sound wave at frequency greater than 20 000Hz, which is the upper limit of the human ear. 1 of 7 Ultraviolet radiation Electromagnetic radiation just beyond the blue end of the visible spectrum. 2 of 7 Useful energy Energy transferred to where it is wanted in the form it is wanted. 3 of 7 Velocity Speed in a given direction (in metres/second (m/s)). 4 of 7 Virtual image An image, seen in a lens or a mirror, from which light rays appear to come after being refracted by the lens or reflected by the mirror. 5 of 7 Visible light The part of the electromagnetic spectrum that can be detected by the human eye. 6 of 7 Volt (V) The unit of potential difference, equal to energy transfer per unit charge in joules per coulomb. 7 of 7
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