The light emitted by a helium neon laser has a wavelength of 632.8 nm in air. As

Question

The light emitted by a helium neon laser has a wavelength of 632.8 nm in air. As the light travels from air into flint glass, find the following. speed in flint glass Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four digit accuracy to minimize roundoff error, m/s wavelength in flint glass Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four digit accuracy to minimize roundoff error, nm frequency

Explanation / Answer

Here,

wavelength = 632.8 nm

a)

refractive index , n = 1.61

speed of light flint glass = 3 *10^8/n

speed of light flint glass = 3 *10^8/1.61

speed of light flint glass = 1.86 *10^8 m/s

the speed of light flint glass is 1.86 *10^8 m/s

b)

wavelength in flint glass = wavelength/n

wavelength in flint glass = 632.8/1.61

wavelength in flint glass = 393 nm

c)

let the frequency is f

f * wavelength = speed

f * 393 *10^-9 = 1.86 *10^8

f = 4.74 *10^14 Hz

the frequency is 4.74 *10^14 Hz

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