physics s
A woman 1.6 m in height wants a plane mirror so that she can view her full height. The minimum vertical size of such a mirror is
0.8 m
A fish looks up through the smooth surface of the water at a bear directly above it. To the fish, the bear appears to be
The ray will experience total internal reflection, the angle of reflection equaling the angle of incidence.
A 1 cm object is placed 20 cm from a lens. The lens forms a real and inverted image of size 1.5 cm. What is the focal length of the lens?
12 cm
An object is placed 10 cm in front of a concave mirror of focal length 30 cm. The image will be formed
15 cm behind the mirror
Which of the following lenses is a diverging lens?
a
While looking into a mirror, you notice that the image of a tree is projected onto the back of a chair (the positions of the tree and image are shown below). You must be looking into
a concave mirror
A real image of a candle formed with a converging lens can be viewed on a screen placed
at a single position determined by the distance of the object and the construction of the lens.
A ray emerges from water (n = 1.33) into air. The light ray will
bend away from the normal on the air side
The focal length of a glass lens depends on
both the curvature of the surface of the lens and the index of refraction of the glass.
A ray of light moves from air into water. Which path most accurately shows the refraction?
c
A shaving mirror and a make-up mirror both magnify the image. Thus, these mirrors are ____________.
concave
Which of the following optical elements used alone can produce a real image of an object?
concave mirror
The cornea of the human eye is an example of
converging lens
The rearview mirror of an auto bears the legend "Objects in mirror are closer than they appear." This mirror is a ______ mirror.
convex
Rays of light traveling through different media hit the boundary between the media and the air. The angle of incidence is the same in each case. Which medium has the largest index of refraction?
d
The image produced by a single diverging lens will ALWAYS be
erect and virtual
A fish looks up through the smooth surface of the water at a bear directly above it. To the fish, the bear appears to be
further away than it really is
When light enters a medium with a higher index of refraction it
is bent towards the normal
Light is refracted as it crosses the interface between two different media because
it changes speed
The image of an object placed 20 cm in front of a concave mirror of focal length 10 cm will be
real and inverted
Converging lens
refracts all light towards the focal point
When light is reflected from a smooth, plane mirror
the angle of reflection is the same as the angle of incidence.
Light from the sun passes through a converging lens and forms an image at
the focal point
Your iphone is 20 cm in front of a flat mirror. You see the reflected image and must refucus your eye, perhas even take off your eyeglasses because...
the image is located 20 cm behind the mirror
A beam of white light in air passes through the transparent object shown. Dispersion is observed to occur. From the diagram we can tell that
the index of refraction is larger for red light than blue
A ray of light traveling in a calm pond strikes the surface at an angle of incidence which is 2° larger than the critical angle. This ray will
undergo total internal reflection and not enter the air at all.
A plane mirror will always produce a
virtual, ertect image
