1.
When you look at yourself in a pocket mirror and then hold the mirror farther away, you see
A
less of yourself
B
more of yourself
C
the same amount of yourself
D
none of the above
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When you look at yourself in a pocket mirror and then hold the mirror farther away, you see
less of yourself
more of yourself
the same amount of yourself
none of the above
When monochromatic light shines through two closely spaced narrow slits and onto a screen some distance away, the pattern on the screen has
no light in it
two large bright spots
alternating dark and light bands
one large bright spot
The shortest plane mirror in which you can see your entire image
is half your height
is twice your height
is equal to your height
cannot be determined
The reason we can read print from any direction is that
the white part of a page reflects light in all directions
letters emit black light in all directions
letters absorb black light from all directions
all of the above
The critical angle for a light from the bottom of a swimming pool shining upward toward the pools surface is the angle
where light is refracted so it just skims the pool surface
43 degrees
at which all light is refracted out of the pool
42 degrees
It is difficult to see the roadway from a car on a rainy night because the road surface
is obscured by the rain itself
that is normally a diffuse reflector when dry becomes a mirror surface when wet
absorbs the light more when wet
scatters light in all directions
In a curved optical fiber, light
gains energy in each internal reflection
internally reflects in a succession of straight-line paths
bends and follows the curve of the fiber
Diffuse reflection occurs when the size of surface irregularities is
larger than 1 m in diameter
large compared to the wavelength of the light used
small compared to the wavelength of the light used
larger than 1 cm in diameter
An echo occurs when sound
is transmitted through a surface
is reflected from a distant surface
changes speed when it strikes a distant surface
all of the above
Coherent light is many different rays of light all having the same
frequency
wavelength
phase
all of the above
An interference pattern is produced when
two or more light waves meet
the crests of two waves meet
the troughs of two waves meet
all of the above
The law of reflection says that
the angle of reflection from a mirror equals the angle of incidence
waves incident on a mirror are partially reflected
all waves incident on a mirror are reflected
the angle a ray is reflected from a mirror is random
When a virtual image is created in a plane mirror
the image is upright
the image is located behind the mirror
reflected rays diverge
all of the above