ap physics iv.c geometric optics. 25.1 wave fronts and rays
Post on 27-Dec-2015
217 Views
Preview:
TRANSCRIPT
Five Properties of the image of a Plane Mirror
• Upright
• Same size
• Located as far behind the mirror as the object is in front of the mirror
• Left to right reversed
• Virtual image
Summary of sign conventions for curved mirrors
• f is positive for a concave mirror and negative for a convex mirror
• so is positive for an image located in front of the mirror (our only concern at this point)
• si is positive for a real image (in front of the mirror) and negative for a virtual image (behind the mirror)
Ex. A 2.00 cm object is placed 7.10 cm from a concave mirror whose radius of curvature is 10.20 cm. Find the location and size of the image.
Ex. An object with a height of 1.20 cm is placed 6.00 cm in front of a concave mirror with a focal length of 10.0 cm. Find the location and height of the image.
Ex. An object is placed 66 cm in front of a convex mirror that has a focal length of 46 cm. Find the image distance and magnification.
p. 821: 1-6; Rev. 04B3, 04B5
2. 0.54114. 1.63, ?6. 0.80004B3a) 1.2 EE -3 Wbb) -0.0136 Vc) i. 0.023 A ii. ?d) ?
04B5a) i. -3600 J
ii. Tough one – ΔU is number of gas particles times ΔKav (5400 J)
iii. 9000 Jb) Drawingc) i. drawing ii. yours
Ex. Light is incident upon an equilateral crown glass prism at an angle of 45.0º to one face. Calculate the angle at which the light emerges from the opposite face.
p. 821: 9-10, 13, 16; Rev. 03B1
10. 21.7º16. a) 33º b) 32º03B1a) Drawingb) 100 Nc) 615 Nd) Yourse) 1.7 m/s2
Ex. A ray of light in a diamond (n = 2.42) strikes an interface at 28º. Will the beam of light enter the air or will it be reflected internally? Will the beam of light be reflected internally if the diamond is surrounded by water?
p. 822: 23-25, 87B5, 01B4
24. 37.8º87B5a) ?b) 53ºc) 1.9 EE 8 m/sd) 3.2 EE -7 m (320
nm)e) 39º
01B4a) 1.6 (hint: use slope of
graph and Snell’s Law)
b) i. 4.4 EE 14 Hzii. 1.9 EE 8 m/siii. 4.3 EE -7 m
c) Drawingd) 37º
Sign conventions for lenses:
f is positive for converging lenses and negative for diverging lensesso is positive when light is reflected from the object (a real object)si is positive when it is behind the lens (real image) and negative when it is in front of the lens (virtual image)
81B5, 82B6, 86B6, 94B5
81B5a) Drawing b) ?c) 9 cm d)
note: 2nd lens is at F of 1st
82B6 a) 3f b) drawing
c) ?86B6 a) drawing b) 6 cm
c) Drawingd) -2 cm e) ?f) Hint: use image of 1st
lens as object of 2nd
94B5 a) 2.3 EE 8 m/sb) Drawing c) 49ºd) 40 cm below pool
bottome) i. ? ii. Hint: are
values for n closer or farther away than in water?
top related