apply.
(a) To the left of C
In between C and F
To the right of F
(b) To the left of C
In between C and F
To the right of F
(c) To the left of C
In between C and F
To the right of FSection 3 - Mirror basics
3.1 As you get ready for your early morning physics class, you comb your hair in front of a planar mirror. You know that you are
3.75 m in front of the mirror. How far away from you is your image?
m3.2 Two parallel planar mirrors face each other. An object is placed between them at a distance x from one and 3x from the
other. If the images created of the object are "first-order" images, and those created of the first-order images are "second-
order" images, how far away are the second-order images from the object, in terms of x?
xSection 5 - The law of reflection
5.1 Two mirrors are placed at a 90° angle to each other. A light ray strikes one mirror 0.710 m from the intersection of the mirrors
with an incident angle of 36.5°. The ray then travels a distance d before reflecting from the second mirror. (a) What is the
distance d? (b) What is the angle with which the light ray is reflected from the second mirror? All angles are measured from
the normal belonging to the appropriate mirror. (c) What is the angle between the direction of the incident ray and that of the
final reflected ray? Express your answer as a positive number between 0° and 360°.(a) m
(b) °
(c) °5.2 You and a friend are playing a game of squirt-
gun tag in a maze. Suddenly you see your
friend's image in a small planar mirror (see
illustration). You take a shot over the barrier in
front of you and find that your friend is just at
the end of the 7.0 m range of your squirt gun.
If you are 4.0 m from the point of reflection of
the light ray, how far from the point of
reflection of the light ray is your friend?
m5.3 Two 3.0 meter-tall planar mirrors are placed facing and parallel to each other 0.75 m apart. If a ray of light just passes the
bottom edge of one mirror and strikes the other at an incident angle of 10°, how many reflections will the light make before
exiting this "hall"?
5.4 A bartender keeps an eye on her customers while her back is turned by way of a mirror mounted behind the bar. The mirror is
0.580 m wide and she is standing 0.750 m from it. How wide an expanse of the parallel wall opposite the mirror can she see
in the mirror if the opposite wall is 6.00 m away from the mirror?
m