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Waves - Coggle Diagram
Waves
Reflection
Occurs when incident wave hits a reflector and reflected back
The direction of propagation of the wave changed when it is reflected
The wavelength, frequency and speed of wave remain unchanged after reflected
The amplitude may or may not changed depend on the material of the reflector and the shape of wavefront.
Reflection of waves obeys the law of reflection
The angle of incident is equal to the angle of reflection
The incident, reflected wave and the normal lie on the same plane
Reflection of light
Application
Periscope of submarine
Cat eye reflector
Head lamp of a car
Reflection of sound
Refraction
When straight wave pass from less dense to more dense
speed decreases
frequency remain unchanged
The wavelength becomes shorter
Sound is clearer at night than day
Deep water to shallow water
Light
Diffraction
Factors affecting the diffraction of wave
Bigger opening
Smaller opening
Characteristic
Frequency does not change
Speed of diffracted does not change
Wavelength does not change
Amplitude of the wave decreases after diffraction
Diffraction is the spreading of wave when it travels through an opening or a small obstacle.
Interference
Anti-node is a point of maximum amplitude where constructive interference occur
Nodal line joins all the node points
Anti-nodal line joins all anti-node points
Node is a point of minimum amplitude where destructive interference occurs
Interference can be constructive or destructive.
Constructive
Destructive
Interference is a phenomenon of wave caused by the superposition of 2 or more coherent waves.
