Alight wave has a 670 {\rm nm} wavelength in air. its wavelength in a transparent solid is420 {\rm nm} .a)what is the speed of light in this solid? b)what is the light's frequency in the solid?

Explanation:

given,

Light wave wavelength in Air, λ_(vac) = 670 nm

wavelength in transparent solid, λ= 420 nm

Refractive index of the solid

   n = 1.6

a) speed of light in the solid

       v = 0.625 c

b) light's frequency in the solid

frequency of light remain same when light move from one medium to another.

 f is the frequency of light

        f = 4.47 x 10⁻¹⁴ Hz

the light's frequency in the solid is equal to 4.47 x 10⁻¹⁴ Hz

hello there!

your answer is a “generator”

a generator does not create energy but instead it transforms it.

it’s basically a motor working in reverse.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )