Flashcards
Physics study P7 Waves and P8 Light
Flashcards do conjunto (15)
- 1Give 3 examples of where wave motions are present.Waves in a ripple tank
Sound Waves in air
Light in air - 2What is the wave length? And what is it measured in?It is the distance between two consecutive points. It is measured in meters.
- 3What is frequency. And what are the units?The number of waves that pass a particular point in one second. Units: Hz
- 4What is Amplitude and what is it measured in?It is the maximum displacement from the rest point (How tall it is). Measured in meters.
- 5What is speed?It is the speed in which the energy is transferred. (m/s)
- 6What are the formulas. (triangle)
- 7What are the crest and the Trough?
- 8What is a transverse wave?It has a crest above the rest axys and a trough below it. Particles vibrate up and down in the direction perpendicular to the motion of the wave.
- 9What is a longitudinal wave?Vibration of particles along the same direction of the wave, it consists of compressions and rarefractions.
- 10What is a refractionThe change of direction of waves when they cross a medium with different density.
- 11What is the first law of reflectionThe angle of incidence is equal to the angle of reflection
- 12What is the point of incidenceThe point at which the incident ray strikes the reflecting surface
- 13What is the normalThe perpendicular drawn to the surface at the point of incidence
- 14What is the angle of incidenceAngle which the incident ray makes contact with the normal. (i)
- 15What is the angle reflectionThe angle of the reflected ray to the normal