Physics Principles and Problems 2009

Section 17.1 : Reflection from Plane Mirrors

Self-Check Quizzes

1
If white light is reflected off a surface, which color of light has the greatest angle of the reflected ray?
A)No light rays will reflect an opaque object.
B)All wavelengths reflect at the same angle to the normal.
C)Red will have the greatest angle because it has the longest wavelength.
D)Violet will have the greatest angle because it has the shortest wavelength.
2
In diffuse reflection, why are the reflected rays not parallel to each other?
A)because the light is of various wavelengths
B)because the surface is not smooth
C)because the incident rays are not parallel
D)because they are only parallel when reflected off a plane mirror
3
Why does a plane mirror make a room appear larger?
A)The incident light rays are all reflected in parallel.
B)The shiny surface increases illuminance.
C)The light scatters from them.
D)Plane mirrors always produce virtual images.
4
A virtual image is _____ the object.
A)the same size as
B)smaller than
C)larger than
D)the reverse image of
5
Images from a plane mirror are _____.
A)smaller than the object
B)left-to-right reversed
C)upside down
D)a front-to-back reversal
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