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53 Cards in this Set
- Front
- Back
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Reflection, refraction, and the formation of images by mirrors and lenses has been successful described by the
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ray model of light.
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The angle of incidence
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must equal the angle of reflection.
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The principle on which mirrors work is
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reflection.
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A plane mirror forms an image that is
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virtual and upright.
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Plane mirrors produce images which
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are always the same size as the actual object.
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An image formed when the light rays do not actually pass through the image location, and would not appear on paper or film placed at that location is referred to as a
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virtual image.
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Is it possible to see a virtual image?
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Yes, the rays that appear to emanate from a virtual image can be focused on the retina just
like those from an illuminated object. |
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A spherical mirror on which reflection takes place on the inner surface of the sphere is referred to as a
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concave mirror.
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A light ray, traveling parallel to a concave mirror's axis, strikes the mirror's surface near its midpoint. After reflection, this ray
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passes through the mirror's focal point.
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An object is positioned between a concave mirror's center of curvature and its focal point. The image produced by the mirror is located
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out past the center of curvature.
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A negative magnification for a mirror means
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the image is inverted, and the mirror is concave.
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If the magnification is a negative value, the image is
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inverted.
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If the absolute value of the magnification is smaller than one, then the image is
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smaller than the object.
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Light enters air from water. The angle of refraction will be
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greater than the angle of incidence.
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The critical angle for a beam of light passing from water into air is 48.8e. This means that all light rays with an angle of incidence greater than this angle will be
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totally reflected.
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A laser beam strikes a plane's reflecting surface with an angle of incidence of 52 degrees. What is the angle between the incident ray and the reflected ray?
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105 degrees
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A concave mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?
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15cm
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An object is 10 cm in front of a concave mirror with focal length 3 cm. Where is the image?
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4.3cm from the mirror
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Light passes from air to water. The incoming ray is at an angle of 17.0 degrees to the normal. The index of refraction is 1.33. What is the angle in the water?
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12.7 degrees
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A diver is 1.2 m beneath the surface of a still pond of water. At what angle must the diver shine a beam of light toward the surface in order for a person on a distant bank to see it? (The index of refraction for water is 1.33.)
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49 degrees
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A beam of light traveling in air is incident on a slab of transparent material. The incident beam and the refracted beam make angles of 40e and 26e to the normal. What is the speed of light in the transparent material?
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2.0 x 10^8 m/s
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What is the critical angle for light traveling from crown glass (n = 1.52) into water (n = 1.33)?
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61 degrees
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Light enters a substance from air at 30.0e to the normal. It continues through the substance at 23.0e to the normal. What would be the critical angle for this substance?
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51.4 degrees
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An object is 10.4 cm tall, and 4.8 cm in front of a diverging lens. The image is 4.0 cm from the lens. How tall is the image?
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8.7cm
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How far from a lens of focal length 50 mm must the object be placed if it is to form a virtual
image magnified in size by a factor of three? |
33mm
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Which of the following is a false statement?
A) All points on a given wave front have the same phase. B) Rays are always perpendicular to wave fronts. C) All wave fronts have the same amplitude. D) The spacing between adjacent wave fronts is one-half wavelength. |
C) All wave fronts have the same amplitude.
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The wave theory of light is attributed to
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Christian Huygens.
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The particle theory of light is attributed to
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Isaac Newton
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When a light wave enters into a medium of different optical density,
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its speed and wavelength change.
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When a beam of light (wavelength = 590 nm), originally traveling in air, enters a piece of glass (index of refraction 1.50), its frequency
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It is unaffected
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When a beam of light (wavelength = 590 nm), originally traveling in air, enters a piece of glass (index of refraction 1.50), its wavelength
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is reduced to 2/3 its original value.
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What principle is responsible for light spreading as it passes through a narrow slit?
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Diffraction
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What principle is responsible for alternating light and dark bands when light passes through
two or more narrow slits? |
Interference
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Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted. Why is this?
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The wavelength of light is much smaller than the wavelength of radio waves.
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Two light sources are said to be coherent if they
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are of the same frequency, and maintain a constant phase difference.
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A beam of light (f = 5.0 x 1014 Hz) enters a piece of glass (n = 1.5). What is the frequency of the light while it is in the glass?
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5.0 x 10^14 Hz
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Light has wavelength 600 nm in a vacuum. It passes into glass, which has an index of refraction of 1.50. What is the frequency of the light inside the glass?
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5.0 x 10^14 Hz
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Light has a wavelength of 600 nm in a vacuum. It passes into glass, which has an index of
refraction of 1.50. What is the speed of the light in the glass? |
2.0 x 10^8 m/s
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Light of wavelength 550 nm in air is found to travel at 1.96 x 10^8 m/s in a certain liquid. Determine the frequency of the light in the liquid.
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5.5 x 10^14 Hz
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Light of wavelength 550 nm in vacuum is found to travel at 1.96 x 10^8 m/s in a certain liquid. Determine the index of refraction of the liquid.
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1.53
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A camera lens that covers the film with a field of view that corresponds approximately to that of normal vision is referred to as a
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Normal lens
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A camera lens that acts like a telescope to magnify images is referred to as a
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telephoto lens
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A camera lens that covers the film with a wider field of view than that of the eye and through which objects appear smaller is referred to as a
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wide-angle lens
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In which of the following ways is a camera different from the human eye?
A) The camera always forms an inverted image, the eye does not. B) The camera always forms a real image, the eye does not. C) The camera utilizes a fixed focal length lens, the eye does not. D) For the camera, the image magnification is greater than one, but for the eye the magnification is less than one. E) A camera cannot focus on objects at infinity but the eye can. |
The camera utilizes a fixed focal length lens, the eye does not.
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The principal refraction of light by the eye occurs at the
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cornea
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The closest distance at which an eye can see objects clearly is
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the near point
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The farthest distance at which an eye can see objects clearly is
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the far point.
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If a person's eyeball is too short from front to back, the person is likely to suffer from
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farsightedness
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If a person's eyeball is too long from front to back, the person is likely to suffer from
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nearsightedness
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Nearsightedness can usually be corrected with
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diverging lens
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Farsightedness can usually be corrected with
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converging lens
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What type of lens is a magnifying glass?
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converging lens
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The resolving power of a microscope refers to the ability to
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form clear images of two points that are very close together.
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