An laser is used of wavelength 544 x 10^-7 m (in air) for eye surgery. The index of refraction of the fluid in an eye is n = 1.43. Calculate the frequency of the laser waves in the eye.
n = 1.43
L1=544 x 10^-7
L1 being the wavelength in "air"
L2 being the wavelength in the eye
The Attempt at a Solution
so, given n and L1 its simple to find L2, so I now know the wavelength in the eye. Yet I can't seem to derive the frequency.
1.43= (5.44 x 10^-7) / (v/f)
the frequency remains constant for both wavelengths.
so simply I would have to find the velocity of L1 or L2 that would be the frequency "within the eye"
the velocity is not the same so I now have 2 unknown variables.
I KNOW this isn't hard, my minds just shot right now