College Physics: A Strategic Approach Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition) (What's New in Astronomy & Physics)
4th Edition
ISBN: 9780134641492
Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher: PEARSON
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Chapter 18, Problem 68GP
Figure P18.54 shows a meter stick lying on the bottom of a 100-cm-long tank with its zero mark against the left edge. You look into the tank at a 30° angle, with your line of sight just grazing the upper left edge of the tank. What mark do you see on the meter stick if the tank is (a) empty, (b) half full of water, and (c) completely full of water?
Figure P18.54
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20. A person looking into an empty container is able to see the far
edge of the container's bottom as shown in Figure P34.20a.
The height of the container is h, and its width is d. When the
container is completely filled with a fluid of index of refrac-
tion n and viewed from the same angle, the person can see
the center of a coin at the middle of the container's bottom as
shown in Figure P34.20b. (a) Show that the ratio h/dis given by
n² – 1
4 – n?
d
(b) Assuming the container has a width of 8.00 cm and is
filled with water, use the expression above to find the height
of the container. (c) For what range of values of n will the
center of the coin not be visible for any values of h and d?
Figure P34.20
A person looking into an empty
container is able to see the far edge
of the container's bottom, as shown
in Figure P22.23a. The height of the
container is h, and its width is d. When the container is com-
pletely filled with a fluid of index of refraction n and viewed
from the same angle, the person can see the center of a coin
at the middle of the container's bottom, as shown in Figure
P22.23b. (a) Show that the ratio h/d is given by
4 - n²
(b) Assuming the container has a width of 8.00 cm and is
filled with water, use the expression above to find the height
of the container.
b.
Figure P22.23
One end of the strip of a plane mirror is fixed and the other end rests on the top of the small vertical
rod. The length of the plane mirror strip is 25cm. A ray of light is incident on the mirror and reflected
from the mirror and forms a spot on a screen 3m away from the mirror. Now, if the top of the rod is
moved upwards 0.1 mm, then what will be movement of the spot?
A
0.24 cm
B
3.4 cm
5 cm
4.5 cm
Chapter 18 Solutions
College Physics: A Strategic Approach Plus Mastering Physics with Pearson eText -- Access Card Package (4th Edition) (What's New in Astronomy & Physics)
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