Question

The portion of the visible spectrum that appears brightest human eye is around 560 nm in wavelength, which corresponds to yellow-green. What is the frequency of 560 nm light?

Answer 1

5.4 * 10^17 Hz

Step-by-step explanation:

Wavelength, λ = 560 nm = 560 * 10^(-9) m

Speed, v, in terms of frequency, f , and wavelength, λ, is given as:

v = λ*f

The speed, v, of visible light is 3 * 10^8 m/s.

Hence, frequency will be:

f = v/λ

f = (3 * 10^8) / (560 * 10^(-9))

f = 0.0054 * 10^17 = 5.4 * 10^14 Hz

Answer 2

5.36x10^14 Hz

Step-by-step explanation:

Data obtained from the question include:

Wavelength = 560nm

Recall: 1nm = 1x10^-9m

Therefore, 560nm= 560 x 1x10^-9 = 5.6x10^-7 m

Velocity = 3x10^8 m/s

Frequency =?

Velocity, frequency and wavelength of a wave are related by the equation:

Velocity = wavelength x frequency

Using the above equation, 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