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igcse physics notesprinted 89 · PDF 89
124 pagesrevision 46936
printed 89 · PDF 89
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As shown in the above diagram, In the Ripple tank there is a source to
produce waves in the tank which over here is a wooden bar supported by
elastic bands so that it can move up and down and produce waves.
Beneath the Ripple tank there is a screen which shows wave fronts of the
waves produced in the ripple tank by source. A light source, which over
here is a bulb, help Wavefronts to form on the screen and make it easy for
us to view them. The distance between two Wavefronts is constant and it is
wavelength.
Reflection of waves in a Ripple tank:
As shown in the above example, the wavefronts are perpendicular to the
incident line which is showing direction of motion. It hits the surface of a
mirror and reflects back. The direction of motion changes but the
wavelength remains the same and wavefronts are perpendicular to the
direction of motion. From normal, Angle of incidence and Angle of reflection