ck-12: ch 14 s2, s3, s4, s5, s6, s7, s8
what is the image distance of an object placed 5 cm in front of a convex mirror that has a focal length of 8 cm?
-13.33 cm
the image distance is 60 cm for a 5 cm tall object placed 20 cm from a double convex lens. what is the height of the image
-15 cm
a dentist uses a concave mirror to examine a tooth that is 1 cm in front of the mirror. the image of the tooth forms 10 cm behind the mirror. what is the mirror's radius of curvature
-2.2 cm
the image distance is 22.5 for a 5 cm tall object placed 45 cm from a double convex lens. what is the height of the image
-2.5 cm
what is the image distance for a 5 cm tall object placed 10 cm from a double convex lens that has a focal length of 15 cm?
-30 cm
what is the image distance of an object placed 3 cm in front of a convex mirror that has a focal length of 8 cm?
-4.8 cm
the image distance is 30 cm from a 5 cm tall object placed 30 cm from a double convex lens. what is the height of the image
-5 cm
a 4 cm tall light bulb is placed a distance of 35.5 cm from a convex mirror with a focal length of -12.2 cm. what is the image distance?
-9.1 cm
a 2 cm tall object is placed 20 cm in front of a concave lens with a focal length of 5 cm. what is the image height
0.4 cm
a 4 cm tall light bulb is placed a distanced of 35.5 cm from a convex mirror with a focal length of -12.2 cm. the image distance is determined to be -9.1 cm. what is the image size
1.02 cm
Light coming straight from a laser pointer passes from air into a tub of liquid. It hits the surface of the liquid at an angle of 28°from vertical, and continues into the liquid at an angle of 22°.What is the index of refraction of the substance in the tub? n =
1.25
an object is placed 3 cm in front of a concave lens with a focal length of 5 cm. what is the image distance
1.875 cm
using the below table to find the speed of light in cooking oil?
1.96 x 10^8 m/s
an image is located -30 cm from a double convex lens that has a focal length of 15 cm. what is the object distance
10 cm
A dentist uses a spherical mirror to examine a tooth. The tooth is 1.00 cm in front of the mirror. The image of the tooth forms 10.0 cm behind the mirror. what is the magnification of the image?
10 times
a light ray strikes a plane mirror at an angle of 80° to the normal. what is the angle that the reflected ray makes with the surface of the mirror
10°
Nisha stands at the edge of an aquarium 3.0 m deep. She shines a laser at a height of 1.7m that hits the water of the pool 8.1 m from the edge. How far from the edge of the pool will the light hit bottom?
11.16 m
Nisha stands at the edge of an aquarium 3.0m deep. She shines a laser at a height of 1.7m that hits the water of the pool 8.1m from the edge. If her friend, Rahul, were at the bottom and shined a light back, hitting the same spot as Nisha's. How far from the edge would he have to be so that the light never leaves the water?
11.3 m
if the angle of incidence for an object and a plane mirror is 30°, what is the angle between the object and its image?
120°
a concave mirror has a radius of curvature 20 cm. locate the image for an object with a distance 40 cm
13.33 cm
what is the object distance for an image 60 cm from a double convex lens that has a focal length of 15 cm
20 cm
a 5 cm tall object is placed 45 cm from a double convex lens that has a focal length of 15 cm. what is the image distance
22.5 cm
what is the critical angle for light passing from diamond into air, given n diamond = 2.42
24.41 degrees
an object is 50 cm to the left and an image is 50 cm to the right of a convex lens. what is the focal length
25 cm
A light ray goes from the air into the water. If the angle of incidence is 34 degrees. What is the angle of refraction?
25 degrees
a concave mirror is designed so that a person 20 cm in front of the mirror sees an upright image magnified by a factor of two. what is the radius of curvature of this mirror?
26.67 cm
a 50 cm tall object is 3.0 m from a plane mirror. how far from the mirror will the image be?
3.0 m
a lens is needed to create an inverted image twice as large as the object when the object is 5 cm in front of the lens. what focal length lens is needed
3.33 cm
a 5 cm tall object is placed 30 cm from a double convex lens that has a focal length of 15 cm. what is the image distance
30 cm
an image is 30 cm from a double convex lens that has a focal length 15 cm. what is the object distance
30 cm
imagine a thread of diamond wire immersed in water. what is the critical angle for light traveling in the diamond wire?
33.3 degrees
Robert shines a laser beam through a slab of plastic and onto the interface between the slab of plastic and the air on the other side. The index of refraction for the plastic is 1.62. What is the angle of incidence in the plastic?
38.12 degrees
A ray of light enters glass at 45° to the horizontal from water. If the index of refraction of water is 1.3, and index of refraction of glass is 1.5, then what is the angle of the refracted ray?
38°
a 2 cm tall object is placed 20 cm in front of a concave lens with a focal length of 5 cm. what is the image distance
4 cm
a double convex lens with a focal length of 15 cm has an image distance of 22.5 cm. what is the object distance
45 cm
a light sources sits in a tank of water, as shown. find the critical angle for the water-air interface. the is the incident angle that corresponds to the largest possible refracted angle, 90 degrees
48.8 degrees
A light source sits in a tank of water, as shown. If one of the light rays coming from inside the tank of water hits the surface at 35.0∘, as measured from the normal to the surface, at what angle will it enter the air?
49.7 degrees
a lens is needed to create an inverted image and its distance is 10 cm when the object is in front of the lens. the focal length is 3.33 cm. what is the distance of the object
5 cm
an object is 45 cm from a double convex lens. the image distance is 22.5 cm and its height is -2.5 cm. what is the height of the object
5 cm
an object is placed 10 cm from a double convex lens. the image distance is -30 cm and its height is 15 cm. what is the height of the object
5 cm
an object is placed 20 cm from a double convex lens. the image distance is 60 cm and its height is -15 cm. what is the height of the object
5 cm
an object is placed 30 cm from a double convex lens. the image distance is 30 cm and the height -5 cm. what is the height of object
5 cm
an object is placed 15 cm in front of a concave lens with a focal length of 8 cm. what is the image distance
5.2 cm
A certain light wave has a frequency of 4.29 x 10^14 Hz. What is the wavelength of this wave in water?
5.26 x 10^-7 m
a man stands 1.52 m in front of a shaving mirror.. the image produced is inverted and has an image distance of 18 cm. how close to the mirror must the man place his face if he wants an upright image with a magnification 2?
5.33 cm
an image is 50 cm to the right of a convex lens with a 25 cm focal length. what is the object distance
50 cm
a 5 cm tall object is placed 20 cm from a double convex lens that has a focal length of 15 cm. what is the image distance
60 cm
what is the critical angle of light traveling from vegetable oil into water? diamond has a refractive index of 1.45, and water has a refractive index of 1.33.
67 degrees
A glass of water (n = 1.33) has a layer of vegetable oil (n = 1.47) floating on top. Total internal reflection will occur at the water-oil interface if a beam of light enters the oil from above the glass with an incident angle of ___
69
total internal reflection of a cup of water will occur at the water-air interface if a beam of light enters the air from the water with an incident angle of __. (the refractive indices of water is 1.3)
69
A certain light wave has a frequency of 4.29 x 10^14 Hz. What is the wavelength of this wave in empty space?
7 x 10^-7 m
A laser beam strikes a plane mirror's reflecting surface with an angle of incidence of 38°. What is the angle between the incident ray and the reflected ray?
76°
you have a concave mirror of focal length 100 cm and you want an image that is upright and 10 times as tall as the object. where should you place the object
9.09 cm
for a converging lens the image will be inverted if the object is located beyong
F
__ mirrors provide a wide angle view
convex
which type of lens is a converging lens
convex lens
which of these materials is the speed of light slowest? 2.42
diamond
a rainbow is formed due to a combination of __
dispersion and total internal reflection
a __ lens has edges wider than the center
diverging
a critical angle is the angle of incidence in the rarer medium, for which the angle of refraction in the denser medium is 90 degrees
false
a diverging lens is a convex lens
false
a virtual image is one from which light rays diverge as they pass through
false
an object is 2.0 m in front of a plane mirror. its image is virtual, inverted, and 2.0 m in front of the mirror
false
the image produced by a plane mirror appears to be inverted relative to the object
false
when the objects being observed are the inside the __ point, a convex lens will make a magnifying lens
focal
a denser object will usually have a ___ index of refraction
greater
which of the following statements is true about the image produced by a plane mirror?
it appears to be reversed left and right
to have a virtual image, the object must be between the __ and the __ point
lens, focal
robert shines a laser beam through a slab of plastic and onto the interface between the slab of plastic and the air on the other side. the index of refraction for the plastic 1.62. if the angle of incidence in the plastic 54 degrees, will the laser beam pass out of the plastic into the air?
no
in convex mirrors, the reflecting surface is on the __ of the sphere
outside
a concave mirror has a radius of curvature 20 cm and an object distance of 40 cm. the image is 13.33 cm from the mirror. the image will be inverted, ___, and diminshed
real
if an object is located beyond 2F for a double convex lens the image will be
real, diminished, inverted
if an object is located between F and 2F for a double convex lens the image will be
real, enlarged, inverted
if an object is located between the center of curvature and the image produced will be
real, inverted, diminished
if an object is located between the center of curvature and the focal point of a concave mirror the image produced will be
real, inverted, enlarged
in which of the following are wide angle images beneficial
rearview mirrors, in-store customer monitors, for viewing large area
___ is the bending of waves when they enter a new medium at an angle.
refraction
the greater the change in the speed of light in different media the greater the angle of __
refraction
if the reflecting surface is a very ___ surface, the reflection will be regular, meaning the light rays maintain their position relative to each other
smooth
which of the following is true for total internal reflection to take place?
the angle of incidence must be greater than the critical angle
a crack in glass appears to be silvery due to:
total internal reflection
which of the following process is responsible for the formation of mirage in the desert?
total internal reflection
light rays that approach the mirror aimed at the focal point will be reflected parallel to the principal axis
true
light rays that come to the mirror parallel to the principal axis reflect as if they come from the focal point
true
convex mirrors provide an __ image
upright
a 50 cm tall object is 3.0 m from a plane mirror. the image will be __ not real.
virtual
if an object is located in front of F for a double convex lens the image will be
virtual, enlarged, upright
if an object is located in front of the focal point and a concave mirror the image produced will be
virtual, enlarged, upright
an object is 2.0 m in front of a plan mirror. its image is ___ , erect, and __ m behind the mirror
virtual. 2.0
the speed of light in ___ is about 230 million m/s
water
