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?

5.36x10^14 Hz

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

i guess it’s a and b

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west