Chapter 1 Waves2.1 Arah Mata Angin1.5 Analysing Interference Of
Waves
Analysing Interference Of WavesChapter 1 WavesInterference Of
Waves Interference happens when two wavefronts meet or arrive at
the same place The waves will interfere constructively or
destructively
Analysing Interference Of WavesChapter 1 WavesPrinciple Of
Superposition According to the principle of superposition, when two
waves overlap, the resultant displacement is equal to the sum of
the displacements of the individual wave.Constructive
InterferenceDestructive Interference
Analysing Interference Of WavesChapter 1 WavesInterference Of
Water WavesThe image below shows the interference pattern formed by
two sets of continuous coherent water waves. Points P, R, S :
constructive interference = antinodesPoints Q, T : destructive
interference = nodesThe thick and thin lines represent wave crests
and wave troughs respectively.
Analysing Interference Of WavesChapter 1 WavesInterference Of
Light Waves Inteference of light waves occurs when two sets of
coherent waves emerged from a double-slit, overlap and interfere
with each other. The bright and dark fringes corresponds to the
constructive and destructive interference respectively. Bright
fringesDark fringesYoungs double-slit experimentInterference
pattern
Analysing Interference Of WavesChapter 1 WavesInterference Of
Sound WavesInterference of sound waves occurs when two sets of
coherent sound waves (produced by a common audio generator),
overlap and interfere with each other. The loud and soft sound at
different locations corresponds to the constructive and destructive
interference respectively.
Analysing Interference Of WavesChapter 1 WavesFormula For
Interference = wavelengtha = distance between two coherent sourcesx
= distance between two consecutive nodes/antinodesD = perpendicular
distance from the source to the position where x is measured.
Worked Example
Analysing Interference Of WavesChapter 1 WavesFormula For
Interference Two loud speakers which are placed 4m apart, connected
to an audio generator, generating sound waves of frequency 600Hz.
The figure below shows the loud and soft sounds detected along a
line, 8m from the loudspeakers. SolutionCalculate
thewavelengthspeedof the sound waves.
Analysing Interference Of WavesChapter 1 WavesWorked ExampleTo
calculate the wavelength of the sound waves. To calculate the speed
of the sound waves. UsingUsing
Analysing Interference Of WavesChapter 1 WavesEND OF CHAPTER
