How Do You Calculate the Period of an Electromagnetic Wave?

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The discussion revolves around calculating the period T of an electromagnetic wave given a maximum electric field of 2450 V/m and a wavelength of 547 nm. The user initially calculated the angular frequency and velocity of the wave but encountered an error in determining the period. They attempted to find the frequency using the formula W/2π but initially arrived at an incorrect value for T. Ultimately, the user resolved the issue independently, indicating they found the correct answer. The thread highlights the importance of accurate calculations in wave physics.
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What is the period T of the wave ?

If i am given:
Maximum electric field of 2450 V/m
Wavelength of 547 nm

I found:
Angular Wave # 1.15*10^7
Angular Frequency 3.45*10^15
Velocity of Electromagnetic Wave 3*10^8 m/s
B max of 8.17*10^-6 T
Intensity of 7960 W/m^2

I tried to solve for T by first finding the frequency which is W/2*pi, or 3.45*10^15/2*3.14 = 5.49*10^14 so then i put in T= 1/F final answer was 1.82*10^-15 which was incorrect! Please Help
 
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nevermind i got it.
 

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