| define wave | transfer of energy from one place to another without any net transfer of matter |
| define wavelength | distance between two identical successive points on a wave or the distance travelled before the wave repeats itself |
| define period | time taken for one complete pattern of oscillation to take place at any point |
| define frequency | the number of oscillations per unit time |
| define displacement | distance at any point of the wave from its rest position |
| amplitude | maximum displacement from a peak and rest position |
| define intensity | power transmitted per unit area perpendicular to the direction of the wave propagation |
| define reflection | when waves rebound from a barrier changing direction but remaining in the same medium |
| define refraction | when waves change direction when they travel from one medium to another due to different wave speed in each medium |
| define diffraction | when a wave spreads out after passing around an obstacle or through a gap |
| define coherent | when two waves have a constance phase relationship |
| define nodes | no displacement |
| define antinode | maximum displacement |
| define fundamental frequency | the lowest frequency , highest wavelength that can be produced |
