Invisible Waves Flashcards
What waves does sound use?
Compressional waves.
The Law Of Reflection
Angle of incidence equals angle of reflection.
What is the difference between a ray and a beam?
Ray is a thin line of light whilst beam is a thick line of light.
How do conduction, convection and radiation work?
Conduction- particles bump into each other.
Convection- flow of particles.
Radiation- no particles, infra-red.
What are myopia and hyperopia?
Short sightedness and long sightedness.
What does sound travel fasted through?
Solids.
What is frequency?
Number of complete waves that pass in one second. Symbol- f
What is a period?
Time it takes for one complete wave to pass. Symbol- T
What is the wave length?
Distance between corresponding points on successive waves.
What is amplitude?
Maximum displacement of a particle of the medium from its rest position.
What is speed?
Measure of how fast the wave is traveling.
What is the difference between mechanical and non mechanical waves?
Mechanical- oscillate through matter.
Non mechanical- don’t oscillate through matter.
.5, 1.5, 2, 4
Virtual, enlarged, upright, candle side
Real, enlarged, inverted, 2fl
Real, inverted, same size, 2fl
Real, inverted, diminished, 1 and 2 fl
Which lens diverges and which converges?
Concavo-convex, convex
What are optic fibres?
Long thin strands of glass classed in plastic, microphones and computers, light to electrical, can’t bend so that angle is not below critical angle.
