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# A plane progressive wave is represented by the equation y = 0.2sin (200πt - 0.5.x)...

### Question

A plane progressive wave is represented by the equation y = 0.2sin (200πt - 0.5.x) where x and y are measured in cm and t in s. What is the frequency of the wave?

A) 0.5Hz

B) 4.0Hz

C) 10.0Hz

D) 100.0Hz

E) 200.0Hz

## Discussion (2)

• Ehis Emmanuel

\( Y=Asin(2πft - 2πfx/\lambda) \Rightarrow 0.2sin(200πt-0.5x)

\therefore 200πt = 2πft
f=200/2 = 100

• @_i_am_tobidaniel

2πft=200πt
2f=200
f=100Hz