superposition

Question 1

principle of superposition

Answer 1

when 2 or more waves of the same nature meet at a point, the resultant displacement is the vector sum ofcthe individual displacements due to each wave at that point.

Question 2

interference

Answer 2

phenomenon where 2 or more waves of the same type (nature) supervise to produce a resultant wave.

Question 3

stationary wave

Answer 3

is a wave in which vibrational energy is stored, rather than transmitted as in a progressive wave. it is the resultant wave produced as a result of the repeated interference of 2 progressive waves of the SAME type, of EQUAL speed, frequency, and amplitude, and, travelling in opposite directions along the same line.

Question 4

coherence/coherent

Answer 4

2 waves are said to be coherent when the phase difference between the 2 waves remain constant and does not vary with time.

Question 5

diffraction

Answer 5

the spreading of waves as they pass through an opening or around an obstacle into the geometrical shadow regions.

Question 6

path difference

Answer 6

the difference between the distances travelled by 2 progressive waves, measured from their sources to the point where they meet.