The wave disturbance is y= 0.02 os(π÷2+50πt)cos(10πx) speed of wave ,antinode and node at x=
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Wavelength and frequency
Light is measured by its wavelength (in nanometers) or frequency (in Hertz).
One wavelength
equals the distance between two successive wave crests or troughs.

Frequency (Hertz)
equals the number of waves that passes a given point per second.
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