The wavelength of yellow sodium light in vacuum is 590nm and in water 442nm.
| August 5, 2021 | education
The wavelength of yellow sodium light in vacuum is 590nm and in water 442nm. What is the refractive index of water for this light?
Refractive index is the ratio of the speed of light in a vacuum to the speed in a medium.
The speed of light is the wavelength times the frequency.
The frequency in this case is the same (yellow light in vacuum and in water), which means that in order to find the refractive index of water, it is necessary to divide the wavelength in vacuum by the wavelength in water.
n = 590 / 442≈1.3348
Answer: the refractive index of light will be 1.3348
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