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KABARAK UNIVERSITY
UNIVERSITY EXAMINATIONS
2011/2012 ACADEMIC YEAR
FOR THE DEGREE OF BACHELOR OF EDUCATION SCIENCE
PHYS 321: PHYSICAL OPTICS
DAY: WEDNESDAY DATE: 30/11/2011
TIME: 10.00 – 12.00 P.M. STREAM: SESS IV&V
INSTRUCTIONS:
Answer question ONE and any TWO other questions.
Question ONE carries 40 MARKS while all the other questions carry 15 marks each.
QUESTION ONE (40 MARKS)
(a)
(b) Explain
(c)
(d) Briefly discuss four processes for producing polarized light from unpolarized light.
(e)
(f) A viewing screen is separated from a double-slit source by 1.2 m. The distance between
the two slits is 0.030 mm. The second-order bright fringe (m = 2) is 4.5 cm from the
center line.
i.
ii.
(g) Light of wavelength 580 nm is incident on a slit having a width of 0.300 mm. The
viewing screen is 2.00 m from the slit.
i. Find the positions of the first dark fringes and the width of the central bright
ii. What if the slit width is increased by an order of magnitude to 3.00 mm? What
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