Physic

Q: NARRBEGIN: Lens formula relatingThe lens formula relating the image distance, p, to the focal length, f, and object distance, s, isThe magnification of a lens isNARRENDA movie projector is equipped with a 0.5 m focal length lens that is positioned 0.505 m in front of the film. The distance in front of the lens that a screen must be placed for an image to be in focus is __________.

Q: The orientation of an image seen projected on a screen by a single lens is always __________.

Q: A __________ lens is thinner at the center than the edges.

Q: A __________ lens is thicker at the center than the edges.

Q: A person looking through eyeglasses sees __________ images.

Q: Image height divided by object height gives __________.

Q: The type of mirror that will allow you to see large areas normally hidden from your view is __________.

Q: The two types of reflection are ______________ and ___________.

Q: The ideal shape for the primary mirror of a telescope is __________.

Q: A one-way mirror works because __________.

Q: The colors you see with a prism result because of __________.

Q: __________ results because the speed of light in a transparent medium varies with frequency.

Q: When you look into a pool of water, the depth looks less than it actually is because of __________.

Q: The critical angle is that angle of incidence for which the angle of refraction equals ______.

Q: A light ray bends when it goes from one medium to another because of __________.

Q: When myopia is corrected surgically, the shape of the ________ is changed.

Q: A ________ lens is used to compensate for hyperopia.

Q: You see colors in a rainbow because of __________.

Q: Optical fibers work because of __________.

Q: Light is totally absorbed when sent through two polaroid filters if their transmission axes are __________.

Q: Certain types of sunglasses are very effective at diminishing light reflected from surfaces because of __________.

Q: When light passes through two or more narrow slits, an alternating dark and bright pattern is observed on a screen because of __________.

Q: Light spreads out when it passes through a narrow slit because of __________.

Q: Liquid crystal displays make use of __________.

Q: You do not see your image when you look at a flat rough aluminum surface because of __________.

Q: In the case of magnification, if image distance (p) is positive, the image is to the ______ of the lens and ______.a. right b. left c. reald. imaginarye. virtual

Q: An image seen projected on a screen by a single lensa. is always erectb. is always invertedc. is a real imaged. is a virtual imagee. none of the above

Q: A lens that is thinner at the center than the edgesa. is a converging lensb. is a diverging lensc. always forms a real imaged. always forms a virtual imagee. none of the above

Q: A person looking through eyeglasses sees a. real images b. virtual images c. erect images d. inverted images e. polarized images

Q: If the magnification produced by an optical system is negative, the image isa. smaller than the objectb. invertedc. upside downd. all of the above

Q: The Hubble Space Telescopea. has a flawed primary mirrorb. has been repairedc. has failedd. none of the above

Q: You look at yourself in a plane mirror. If you move away from the mirror and look at yourself again, you now seea. more of yourselfb. less of yourselfc. the same amount of yourselfd. a larger image of yourselfe. a smaller image of yourself

Q: Fresnel lenses area. made of mirror segmentsb. made of the surface portions of a regular lensc. found in some auto headlamps and theater lights and rear windows of RVsd. all of the above

Q: When light enters glass from air, which of these properties of the light change?a. frequencyb. wavelength c. speedd. all of the above

Q: When a light ray traveling in air meets the surface of a piece of glass, which of the following occur at the interface? a. The light is totally reflected. b. Some of the light is reflected back into the air. c. Some light enters the glass and is refracted toward the normal. d. Some light enters the glass and is refracted away from the normal.. e. All of the light enters the glass.

Q: Halos are most often observed in the ____________ time of the yeara. spring b. summer c. falld. winter

Q: In an astronomical telescope the secondary mirror isa. concave b. convex c. sphericald. plane

Q: The light directly from the sun isa. polarized b. unpolarized c. horizontally polarizedd. vertically polarized

Q: The advantage of a convex mirror is that it has a __________ field of viewa. narrow b. linear c. wided. open

Q: The mirror on the passenger side of modern automobiles is a ___________ mirrora. convex b. concave c. planed. spherical

Q: The magnification of the magnifying glass in the previous problem is a. +3 b. "3 c. +15 d. "15 e. +30

Q: A magnifying glass with focal length 15 cm is placed 10 cm above a stamp. The image of the stamp is located a. 30 cm above the magnifying glass b. 30 cm below the magnifying glass c. 30 cm above the stamp d. 30 cm below the stamp e. 15 cm from the magnifying glass

Q: For the projector in the previous problem, the image is ____________ times as large as the object. a. 0.001 b. 1.01 c. 50 d. 100 e. 101

Q: The fact that light can be polarized shows that light isa. polar c. an electromagnetic waveb. monochromatic d. a transverse wave

Q: Two otherwise identical light waves arriving at the same point with peak matching valley undergoa. constructive interferenceb. destructive interferencec. polarizationd. none of the above

Q: Of EM waves having these wavelengths, which would be visible?a. 100 nmb. 500 nmc. 1000 nmd. 1 nme. none of the above

Q: A nanometer isa. one thousandth of a meterb. one millionth of a meterc. one billionth of a meterd. one trillionth of a metere. none of the above

Q: A lens that is thicker at the center than the edgesa. is a converging lensb. is a diverging lensc. always forms a real imaged. always forms a virtual imagee. none of the above

Q: Choose the lens having the shortest focal length.a. b. c.

Q: Image height divided by object height gives a. image distance b. object distance c. magnification d. real image size e. virtual image size

Q: An image formed using a converging lens a. is always real b. is always virtual c. can have negative magnification d. can never be upright

Q: The type of mirror that will allow you to see large areas normally hidden from your view is a. concave b. convex c. plane d. half-silvered e. polaroid

Q: The ideal shape for the primary mirror of a telescope is a. concave circular b. convex circular c. concave parabolic d. convex parabolic e. plane

Q: A one-way mirror works because of a. interference b. diffraction c. its surfaces being half-silvered d. dispersion e. polarization

Q: Upon entering a medium in which the speed of light is 1.5 ï‚´108m/s from a medium in which the speed of light is 2 ï‚´108m/s, an oblique light ray will be _____________ the normal to the interface between the two media.a. bent away from b. bent toward c. travel alongd. remain undeviated with respect to

Q: What makes pink ink pink?a. refraction b. selective absorption c. dispersiond. none of the above

Q: Diverging light rays from a nearby object (a few focal lengths away from the mirror) strike the surface of a concave mirror. After reflecting from the mirror's surface, the rays will converge ata. the mirror's focal pointb. a point beyond the mirror's focal pointc. a point nearer than the mirror's focal pointd. none of the above

Q: Parallel light rays from a distant object strike the surface of a concave mirror. After reflecting from the mirror's surface, the rays will converge ata. the mirror's focal pointb. a point beyond the mirror's focal pointc. a point nearer than the mirror's focal pointd. none of the above

Q: What is meant by the term "plane mirror?"a. not an unusual mirror b. a flat mirror c. a horizontal mirrord. none of the above

Q: New telescopes are using "adaptive optics." What is that? a. using parabolic instead of spherical mirrors b. using computer image processing to enhance images c. building mirrors in hexagonal segments d. continually adjusting the mirror's shape during observations

Q: The primary mirror in an astronomical telescope must be aa. half-silvered mirrorb. convex mirrorc. concave mirrord. plane mirror.

Q: The sky is blue because of a. interference b. diffraction c. scattering d. dispersion e. polarization

Q: Rank the following media in order according to the speed of light in them, from slowest to fastest: vacuum, air, water and glass.a. air, water, glass, vacuumb. glass, air, water, vacuumc. water, glass, air, vacuumd. glass, water, air, vacuume. none of the above

Q: You see colors with a prism because of a. interference b. diffraction c. specular reflection d. dispersion e. polarization

Q: The variation of the speed of light in a transparent medium with frequency results in a. interference b. diffraction c. dispersion d. diffuse reflection e. polarization

Q: In air a light source emits a wavelength of 630 nm. Under water the wavelength of this light will be a. 630 nm b. less than 630 nm c. more than 630 nm d. unpredictable

Q: In this figure a light ray travels between air and glass. Which way did the light ray go?a. from the air into the glass.b. from the glass into the air.c. either A or B.d. none of the abovethis depicts an impossible situation.

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