1)At what angle above the horizon is the Sun if light from it is completely pola

Question

1)At what angle above the horizon is the Sun if light from it is completely polarized upon reflection from water?
=__________Degrees

2)A diffraction pattern is produced on a screen 134 cm from a single slit, using monochromatic light of wavelength 480 nm. The distance from the center of the central maximum to the first-order maximum is 2.80 mm. Calculate the slit width. (Hint: Assume that the first-order maximum is halfway between the first- and second-order minima.)
=_______________mm

3)Unpolarized light passes through two Polaroid sheets. The transmission axis of the analyzer makes an angle of 27.4

Explanation / Answer

1)

p = tan-1n

    = tan-1(1.33)

    = 53.06

>>>> = 90 - 53.06 = 36.94 degrees

2)

y1 = L/a

y2 = 2L/a

y = (y1+y2)/2 = (L/a) *(3/2)= 1.5*1.34*480e-9/(2.8e-3) = 0.34 mm

3)

a)

I = I0 cos21 cos22

the light is nnpolarized initially >>>>

I / I0 = 1/2 * cos2(27.4) = 0.3941

b)

1 - 0.3941 - 0.5 = 0.606 -0.5 = 0.106

0.106 of the original light is absorbed

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