What is the frequency of green light if the wavelength is 4.2 x 10^(-9) m?

The frequency of green light is 7.14*10¹⁶ Hz

Explanation:

Wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. it is expressed in units of length (m).

Frequency is the number of vibrations that occur in a unit of time. Its unit is s⁻¹ or hertz (Hz).

Propagation speed is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave's disturbance propagates throughout its displacement. Relate wavelength (λ) and frequency (f) inversely proportional using the following equation: v = f * λ.

So, light has an exact speed of 299,792,458 kilometers per second, which usually approaches 3 * 10⁸ m/s.

Then, you know:

Replacing:

3*10⁸ m/s=f*4.2*10⁻⁹ m

Solving:

f= 7.14*10¹⁶ Hz

The frequency of green light is 7.14*10¹⁶ Hz

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.