P1E GLOSSARY

ALL THE WORDS YOU NEED TO KNOW FOR P1E SINGLE SCIENCE, OCR BOARD - HIGHER TIER, PHYSICS

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P1e
Analogue ­ signal that can have any value within a range
Critical angle ­ waves which hit a boundary at less than this
angle will be completely reflected
Digital ­ signal that can only have one of two values within a
range
Multiplexing ­ method of sending many messages down a single
link simultaneously
Optical fibre ­ thin strand of very transparent glass for carrying
pulses of light long distances
Refraction ­ the change in direction of a wave as it passes from
one material to another
Total internal reflection ­ reflection inside a material when the
angle of incidence exceeds the critical
angle

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