The wavelength of violet light is about 425 nm (1 nanometer = 1 × 10−9 m). what are the frequency and period of the light waves?

1) Frequency:

The frequency of electromagnetic radiation is given by:

where

is the speed of light

is the wavelength

In this case, the wavelength of the radiation is

Therefore the frequency is

2) Period:

The period is equal to the reciprocal of the frequency of the wave:

Using the frequency we found previously, , we find:

ι вєℓιєνє ιт ιѕ тнє fιяѕт ¢нσι¢є(α.)

нє ѕнσυℓ∂ ѕмιℓє ρσℓιтℓу αи∂ ѕρєαк тσ тнє ρєяѕσи ωнσ ιѕ ιитєяяυριиg αfтєя тнє ∂ιѕ¢υѕѕισи

нσρє ι ¢συℓ∂ нєℓρ.