1. A beam of light enters a glass material at an angle of 20 degrees the refract

Question

1. A beam of light enters a glass material at an angle of 20 degrees the refracted angle of the beam of light is 34 degrees. What is the refractive index of the glass if the light beam is traveling through air initially?

2. A laser is shined through a 500 line/ mm diffraction grating and produces 3 orders of diffraction. If the second order has a degrees what is the wavelength of the light?

3. A beam of light passes through polarized lens if the initial intensity of the light is 70% and the polarized is at an angle of 30 degrees, what is the actual intensity of the light after it passed through the polarizer.

4. If a light with the passes through a diffraction grating that is .23 m from the screen. If the 3rd order point is .2 m away from the 0th order. What is the diffraction gratings distance between lines?

Explanation / Answer

1)

here by using the snells law

n1 * sin(theta1) = n2 * sin(theta2)

refrective index of air = 1.003

1.003 * sin20 = n2 * sin34

n2 = 0.61

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