Question

Calculate the frequency of green light whose wavelength is 486nm.

Answer 1

Frequency =speed of light divided by wavelength

Answer 2

Given - λ (wavelength of green light) = 486nm

To find - the frequency of green light (f)

Solution -

The given problem can be solved using the following process that is as follow:

Let 'f' be the frequency of green light, 'c' be the speed of light and let 'λ' be the wavelength of green light.

As per the given condition,

λ = 486nm

λ $= 486*10^{-9}m$

$3*10^{8}m/s$....(as the speed of the light is $3*10^{8} m/s$ )

As we know, the speed of the given light is equal to frequency times its wavelength.

c = f × λ ...........(formula)

∴ f = c/λ ..........(rearranging the formula)

∴ By inserting the given values in the above-mentioned formula. we get,

$f=3*10^{8}/486*10^{-9}$ .........(from given)

$f=0.00617*10^{17}$

$f=6.17*10^{14} Hz$

Hence, the frequency of the green light is 6.17*$10^{14}$ Hz