a) Calculate Brewster\'s angle for light incidentfrom diamond into air if thegla
ID: 1676638 • Letter: A
Question
a) Calculate Brewster's angle for light incidentfrom diamond into air if theglass has an index of 2.409.b) Unpolarized light is incident on a series of twoPolaroid sheets. The intensity of the light emerging from thesecond sheet is 27.7% of theintensity of the light incident on the first sheet. Find the anglebetween the transmission axes of the two sheets.
c) At what distance from a single slit ofwidth 0.155 mm should a screenbe placed so that the width of the Fraunhofer central diffractionmaximum is 15.5 mm (100 timesthe slit width), using light of wavelength 476 nm?
b) Unpolarized light is incident on a series of twoPolaroid sheets. The intensity of the light emerging from thesecond sheet is 27.7% of theintensity of the light incident on the first sheet. Find the anglebetween the transmission axes of the two sheets.
c) At what distance from a single slit ofwidth 0.155 mm should a screenbe placed so that the width of the Fraunhofer central diffractionmaximum is 15.5 mm (100 timesthe slit width), using light of wavelength 476 nm?
Explanation / Answer
Index of refraction of diamond n = 2.409
Angle of polarization P = tan -1 ( n )
= 67.45 degrees
(b). Intensity of the unpolarised light be I
Intensity of the light after 1 st sheet I ‘ = I /2
Intensity of the light after 2 nd sheet I “ = I‘ cos 2
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