What is the formula for rise/fall time of a sine wave?

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SUMMARY

The rise and fall time of a sine wave can be calculated using the formula involving the arcsine function. Specifically, for a sine wave represented as V_o sin(2πft), the rise time to reach a certain voltage level (e.g., 0.1 V_o or 0.9 V_o) is given by t1 = arcsin(0.1)/(2πf) and t2 = arcsin(0.9)/(2πf). The total time for a complete cycle of the sine wave is 2π, with the rise and fall times being π/2 each if defined as the time taken to reach the peak and return to zero. The discussion highlights the importance of understanding the relationship between wave velocity, wavelength, and the time period of the sine function.

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  • Understanding of sine wave equations and their properties
  • Knowledge of trigonometric functions, particularly arcsine
  • Familiarity with frequency (f) and its role in wave calculations
  • Basic concepts of wave velocity and wavelength
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  • Learn about the relationship between frequency, wavelength, and wave velocity
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  • Study the effects of damping on wave rise and fall times
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Tom McCurdy
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Does anyone remember the formula for the rise/fall time for a sine wave...?

I thought I could calculate it but I did it wrong apparently
t1.
V_o sin(2*\pi*f*t)=.1 V_o

\frac{arcsin(.1)}{2 \pi f}

t2.
V_o sin(2*\pi*f*t)=.9 V_o

\frac{arcsin(.9)}{2 \pi f}

t2-t1...
but that isn't right
 
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Ahhh would I just have to change .1 and .9 to
.2 and .8
 
What, exactly, do you mean by "rise and fall time". The period of the sine function, sin(x), is 2\pi- that's the "time" for an entire cycle. If, by "rise and fall" time, you mean the time for the function to go up to its highest value and then back to 0, that would be 1/2of that, \pi. Or, you might mean the time to rise and the time to fall. Each of those would be \pi/2.

Of course, then, I have no idea where you got the "0.1" and "0.9". Or even "0.2" and "0.8"!
 
how is time in radians ? its just the time period i suppose. And shouldn't the time for rise and fall depend upon wave velocity or wavelength ?
 

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