Explain what is meant by a progressive wave?
-A wave that transfers energy from one point to another.
-without transferring material/matter.
Describe the nature of a longitudinal wave?
- oscillations of a medium.
-which is parallel to the directions of the wave travels, where energy is transferred from.
Describe the nature of a transverse wave.
-oscillations of a medium
-which is perpendicular to the direction the wave travels, which energy is transferred from.
Define polarisation
Restrictions of vibrations to a single plane.
Define amplitude of a wave
The maximum displacement from the equilibrium position.
State the term frequency of a wave
Number of complete waves passing a fixed point per second.
State the condition for a stationary wave to form
-2 waves travelling in opposite directions.
-similar/same amplitude
-same frequency and wavelength.
Define monochromatic light
A single wavelength/ frequency.
Define coherent sources
Constant phase relationship and same frequency.
What is ment by a critical angle?
-The angle of incidence at the more dense to less dense boundary.
-producing an angle of refraction of 90.
Define photoelectric effect
-Release of electrons from (metal) surface when electromagnetic radiation is incident on the surface.
