This is a part of refraction of light; does this statement not contridict it's self?

As the speed of light is reduced in the slower medium, the wavelength is shortened proportionately. The frequency is unchanged; it is a characteristic of the source of the light and unaffected by medium changes.

Question

This is a part of refraction of light; does this statement not contridict it's self?

As the speed of light is reduced in the slower medium, the wavelength is shortened proportionately. The frequency is unchanged; it is a characteristic of the source of the light and unaffected by medium changes.

irishboy123 · Answer

how does it contradict itself?!

anonymous · Answer

it says the wave length is shortened (which i thin means higher frequency) and then it says that the frequency is unchanged

irishboy123 · Answer

no

$$v = f \; \lambda$$
both v and $\lambda$ decrease, f stays constant

anonymous · Answer

Ohhhh! sorry i am still at 10th grade level. Thank you.