The portion of visible spectrum that appears brightest to the human eye is around 500 nm in wavelength, which corresponds to yellow-green. What’s is the frequency of 560 nm light ?
From Internet:
The frequency of the 560nm light can be obtained as follow: Velocity = wavelength x frequency 3x10^8 = 5.6x10^-7 x frequency Divide both side by 5.6x10^-7 Frequency = 3x10^8/5.6x10^-7 Frequency = 5.36x10^14 Hz Therefore, the frequency of 560 nm light is 5.36x10^14 Hz