A light wave has a 670 nm wavelength in air. Its wavelength in a transparent sol

Question

A light wave has a 670 nm wavelength in air. Its wavelength in a transparent solid is 396 nm.
A) What is the speed of light in this solid? _________m/s
B) What is the lights frequency in the solid? ___________ Hz A light wave has a 670 nm wavelength in air. Its wavelength in a transparent solid is 396 nm.
A) What is the speed of light in this solid? _________m/s
B) What is the lights frequency in the solid? ___________ Hz
A) What is the speed of light in this solid? A) What is the speed of light in this solid? _________m/s
B) What is the lights frequency in the solid? ___________ Hz

Explanation / Answer

A)

Here ,

refractive index = wavelength in air / wavelength in solid

refractive index , n = 670/396

n = 1.691

A)

speed of light in solid = c/n

speed of light in solid = 3 *10^8/1.691

speed of light in solid = 1.773 *10^8 m/s

b)

frequency of light = speed/wavelength

frequency of light = 1.773 *10^8/396 *10^-9

frequency of light = 4.78 *10^14 Hz

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