Unit: Waves
Year: 1996 Question#: 41
Question: A beam of monochromatic light(
=5.9 x 10-7m) crosses a boundary from air into Lucite at an angle of incidence of45°. The angle of refraction is approximately(1 ) 63°
(2 ) 56°
(3 ) 37°
(4 ) 28°
What is this question really asking?
Explanation by: Jarrett SK
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Answer 1
63°
INCORRECT
The correct formula for this problem is n1 sin
11 = n2 sin
2. Try using correct formula.return to top
Answer 2
56°
INCORRECT
The correct formula for this problem is n1 sin
11 = n2 sin
2. Try using correct formula.return to top
Answer 3
37°
INCORRECT
The correct formula for this problem is n1 sin
11 = n2 sin
2. Try using correct formula.
return to top Answer 4
28°
CORRECT
The correct formula for this problem is
n1 sin
11 = n2 sin
2 n1 sin
11 = n2 sin
2 (1)sin45°=(1.5)sin
sin
=.4714
=28°
return to top What's this question really asking?
Can you use Snell's law and look up indices of refraction off the reference table. return to top
