Physics of Everyday Phenomena
W. Thomas Griffith
Juliet W. Brosing
Chapter 17
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Question 17.1
The angle that a incident light ray makes with
the surface normal
A) is smaller than the angle that the
reflected ray makes with the normal
B) the same size as the angle that the
reflected ray makes with the normal
C) greater than the angle that the reflected
ray makes with the normal
Question 17.2
You would like to buy a full-length mirror which
allows you to see yourself from head to
toe. The minimum height of the mirror is
A) half your height.
B) two-thirds of your height.
C) equal to your height.
Question 17.3
When using rays to represent the direction of
light, these are drawn
A) perpendicular to the wavefronts
B) parallel to the wavefronts
C) so they have no relation to the wavefronts
Question 17.4
A surface normal is
A) A normal everyday surface, like a desk
B) A line drawn parallel to a surface
C) A line drawn perpendicular to a surface
D) A line drawn 45° to a surface
Question 17.5
The speed of light in vacuum is
A) smaller than the speed of light in glass
B) the same as the speed of light in glass
C) greater than the speed of light in glass
Question 17.6
The index of refraction,n, is calculated as
A) the ratio of the speed of light in the
material to that in a vacuum (n=v/c)
B) the ratio of the speed of light in a vacuum
to that in the material (n=c/v)
C) the product of the speed of light in a
vacuum to that in the material(n=vc)
D) the square root of the speed of light in
the material (n=
)
v
Question 17.7
A laser beam is incident upon a piece of glass
as shown. Inside the glass, the laser beam
will take path
nair = 1.000, nglass = 1.50
A) 1
B) 2
C) 3
Question 17.8
In which case can total internal reflection occur?
nwater = 1.333, nglass = 1.50, nair = 1.000
A) At the interface between glass and water, when
traveling in glass.
B) At the interface between glass and water, when
traveling in water.
C) At the interface between air and water, when
traveling in air.
D) At the interface between air and glass, when
traveling in air.
Question 17.9
The point where rays intersect when leaving
the lens, if they were traveling parallel to the
axis when they entered the lens, is called
the
A) aperture
B) surface normal
C) focal point
D) vertex
Question 17.10
The focal length of a converging lens is
A) negative
B) zero
C) positive
D) infinity
Question 17.11
Which of the following light rays is drawn
incorrectly?
A) a
B) b
C) c
D) d
E) e
Question 17.12
An object is located in front of a converging lens
with focal length F as shown. The image can
be described as
A) upright, magnified,
and real.
B) upright, diminished,
and virtual.
C) inverted, diminished, and real.
D) inverted, magnified, and virtual.
Question 17.13
The focal length of a convex mirror is
A) positive
B) negative
C) zero
D) infinity
Question 17.14
A concave mirror has a focal length F. An
object that is placed in front of the mirror has
an image that
A) can be upright or inverted.
B) is always upright.
C) is always inverted.
D) depends on the magnitude of F.
Question 17.15
To save on electricity and eliminate heat in the
kitchen, you would like to build a solar
cooker. Which type of mirror would work
best?
A) convex
B) concave
C) planar
Question 17.16
Your rearview mirror states "OBJECTS IN
THIS MIRROR ARE CLOSER THAN THEY
APPEAR." The mirror is
A) convex.
B) concave.
C) planar.
Question 17.17
If you hold a shiny spherical Christmas tree
ornament at arm's length and look at your
reflection, the image is
A) upright and enlarged.
B) upright and reduced.
C) inverted and enlarged.
D) inverted and reduced.
Question 17.18
In people who are nearsighted the lens in their
eye focuses the image in front of the retina.
Do nearsighted people need glasses with
converging lenses or diverging lenses?
A) converging
B) diverging
C) depends on the person
Question 17.19
The players on Survivor need to start a fire to
cook their food. One team member is
farsighted, another is nearsighted. Whose
glasses should they use to focus sunlight on
the tinder?
A) The nearsighted person's.
B) The farsighted person's.
C) Either of them would work.
Question 17.20
In order to use a simple magnifying glass, you
want to place the object of interest
A) at a distance greater than that of the
focal point.
B) between the magnifying glass and the
eye.
C) at a distance less than that of the focal
point.
Question 17.21
Given this schematic diagram of a defective
eyeball, which of the lenses shown can
correct for this defect?
A) a
B) b
C) c
D) d
E) e
Question 17.22
Hermione wears glasses that
make her eyes look larger
than they actually are.
These glasses are
A) for correcting nearsightedness.
B) for correcting farsightedness.
C) for cosmetic purposes only.
Question 17.23
Suppose you take the eyepiece out of a
microscope and replace it with an eyepiece
having twice the focal length. The
magnification of the microscope will
A) double.
B) halve.
C) remain unchanged.
D) quadruple.
E) none of these.
Answers to Chapter 17
1)
2)
3)
4)
5)
6)
7)
8)
B
A
A
C
C
B
C
A
9)
10)
11)
12)
13)
14)
15)
16)
C
C
D
C
B
A
B
A
17)
18)
19)
20)
21)
22)
23)
D
B
B
C
A
B
B