Exploring Creation with Physics Module #12 Test
(1nm = 10
-9
m, h = 4.14 x 10
-15
eV-sec)
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Be sure to write all your answers with the proper number of significant figures and to list the units that go with your answers!
01. What kind of images are formed in a flat mirror: real or virtual?
02. What is the difference between a real image and a virtual image?
03. If substance A has half the index of refraction of substance B, which is (most likely) more dense?
04. State the Law of Reflection.
05. If you want to avoid spherical aberrations in your curved mirrors, what kind of mirror should you use?
06. You are looking at an object up close. Suddenly, you look at an image far away. What happens in your eye to change its focus?
07. In the situation described above, what would you do to change the focus of a camera?
08. An object is placed 7.0 cm away from a concave spherical mirror whose radius of curvature is 10.0 cm. Draw a ray tracing diagram to illustrate what the image will look like. Is it real or virtual? Is it upright or inverted? Is the image magnified, reduced, or essentially the same size as the object?
09. An object is placed 2.5 cm away from a spherical, convex mirror whose radius of curvature is 3.0 cm. Draw a ray tracing diagram to illustrate the image, and determine whether the image is real or virtual, upright or inverted, and magnified or reduced.
10. Light traveling in ice (n = 1.31) is incident on air at an angle of 35°. What is the angle of refraction?
11. The speed of light in a certain plastic is 2.4 x 10
8
m/sec. What is the index of refraction of the plastic?
12. Light is traveling in diamond. If it encounters air at an angle of incidence equal to 20.1° and refracts at 56.3°, what is the index of refraction of diamond?
13. A converging lens has a focal point that is 6.0 cm from its center. If an observer looks through the lens at an object 1.5 cm from the lens, what will the image look like? Is it real or virtual? Is it upright or inverted? Is the image magnified, reduced, or essentially the same size as the object?
14. A converging lens has focal points that are 4.0 cm from its center. If an observer looks through the lens at an object 6.0 cm from the lens, how does the image appear? Is it real or virtual? Is it upright or inverted? Is the image magnified, reduced, or essentially the same size as the object?
15. A diverging lens has focal points that are 16.0 cm from its center. If an observer looks through the lens at an object 10.0 cm from the lens, how does the image appear? Is it real or virtual? Is it upright or inverted? Is the image magnified, reduced, or essentially the same size as the object?