Exam #1 from 201, brief answers -corrected 4/5/11 2:45 pm
1a 2b 3b 4a 5c 6d 7b 8d 9d 10d
11a) 20o b) 38.5o c) 1.24X108 m/s
12a) 2.89o b) Diffraction is caused by light
passing thru a small opening or passing near a small obstacle.
Dispersion is caused by light refracting in a material with an index of
refraction that depends on wavelength.
13a) 97% b) Yes, 80o from vertical.
14 a) f = -53.2 cm (power of -1.8 D) b) Draw a ray diagram with f = -53.2 cm and do=27 cm (You can use this applet to see what it should look like - you will
probably have to scale your #'s to make them fit, for example, use
f =-5.32 and p=2.7) . Be sure to follow the instructions and rubric from the notes.