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Physical Science 12Th Edition By Bill Tillery – Test Bank

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Physical Science 12Th Edition By Bill Tillery – Test Bank

Physical Science, 12e (Tillery)

Chapter 7 Light

1) A fluorescent light source emits light as a result of high temperature.

2) The range of energies emitted by the Sun is most intense near the yellow-green wavelengths.

3) The change in the direction of light as it passes through the boundary between two media is called refraction.

4) The angle of incidence is equal to the angle of refraction.

5) The slower light through a given substance, the greater the index of refraction.

6) Longer wavelengths are affected more by a prism or water droplets than are the shorter wavelengths.

7) The sky appears blue due to the light reflected from the oceans.

8) Glare is light that tends to be polarized predominantly in the horizontal plane.

9) Ultraviolet light waves carry more energy than infrared light waves.

10) Interference is a property of light most easily explained by the particle model.

11) Which of the following objects does NOT emit visible light of its own?

  1. A) a candle flame
  2. B) the Sun
  3. C) the Moon
  4. D) a burning ember of coal

12) When an electric stove element is hot enough, it gives off a dull red glow. When it cools to the point that it no longer glows, it will

  1. A) emit only shorter wavelength energy.
  2. B) emit the same wavelength as before, but with less energy.
  3. C) emit only longer wavelength energy.
  4. D) stop emitting energy altogether.

13) You are able to see nonluminous objects because light has undergone

  1. A) diffuse reflection.
  2. B) refraction.
  3. C) constructive interference.
  4. D) a change in speed.

14) The frequency of light is

  1. A) directly proportional to its wavelength.
  2. B) inversely proportional to the velocity.
  3. C) independent of the temperature of the source.
  4. D) None of the answers is correct.

15) Phenomena such as diffraction and interference can be most easily explained in terms of the

  1. A) ray model of light.
  2. B) particle model of light.
  3. C) wave model of light.
  4. D) photoelectric effect.

16) If 1 is the incident ray, what is the angle of reflection?

  1. A) A
  2. B) B
  3. C) C
  4. D) D

17) Which numbered arrow is the refracted ray indicated by?

  1. A) 1
  2. B) 2
  3. C) 3
  4. D) 4

18) If angle A is 60º, what does angle C measure?

  1. A) 60º
  2. B) 90º
  3. C) 30º
  4. D) roughly 25º

19) What are the units of h in the equation E = hf?



  1. C) J×s
  2. D) W×m

20) The colors of light’s visible spectrum can be measured in units of

  1. A) wavelength.
  2. B) frequency.
  3. C) energy.
  4. D) All of the answers are correct.

21) We explain light today

  1. A) mostly with particle models.
  2. B) mostly as a wave phenomenon.
  3. C) as having both wave and particle characteristics.
  4. D) as something completely unknown.

22) Max Planck discovered that the blackbody radiation emitted by vibrating molecules

  1. A) was continuous, like a train of waves.
  2. B) was constant for all objects.
  3. C) varied greatly from one experiment to the next.
  4. D) appeared to come in multiples of certain fixed amounts.

23) The photoelectric effect could not be adequately explained with a wave model of light because

  1. A) the energy of the electrons ejected from a metal varied directly with the intensity.
  2. B) the number of electrons ejected from a metal depended upon the intensity.
  3. C) the number of electrons ejected from a metal depended upon the wavelength.
  4. D) the energy of the ejected electrons did not depend upon the intensity.

24) The Sun appears reddish as it sets because

  1. A) the Sun emits more energy at longer wavelengths at sunset.
  2. B) more of the shorter, bluer wavelengths are scattered away by the dust and haze.
  3. C) the Doppler shift lowers the frequency as a given spot on Earth rotates away from the Sun.
  4. D) more of the longer, redder wavelengths are scattered by the atmosphere.

25) The image formed by a plane mirror is

  1. A) virtual
  2. B) real
  3. C) a result of diffuse reflection
  4. D) smaller than the object

26) Farsightedness, or hyperopia, can be corrected with which type lens?

  1. A) convex
  2. B) concave
  3. C) reflecting
  4. D) None of the answers is correct.

27) Near-sightedness, or myopia, can be corrected with which type lens?

  1. A) convex
  2. B) concave
  3. C) reflecting
  4. D) None of the answers is correct.

28) A mirage is caused by hot air near the ground

  1. A) refracting light rays upward.
  2. B) reflecting light rays upward.
  3. C) refracting light rays downward.
  4. D) reflecting light rays downward.

29) A rainbow always appears

  1. A) in the part of the sky in the same direction as the Sun.
  2. B) in the part of the sky opposite from the Sun.
  3. C) at an angle of 50 to 54 degrees from the Sun.
  4. D) only at sunset.

30) Polarizing sunglasses are useful because they are able to

  1. A) use the critical angle to block light.
  2. B) reflect glare.
  3. C) absorb reflected light, which is polarized.
  4. D) refract reflected light, which causes glare.

31) The index of refraction for flint glass is 1.5. This means that

  1. A) light travels faster in this substance than it does in vacuum.
  2. B) the wavelength of light passing through glass is 1.5× longer as it is in vacuum.
  3. C) the speed of light is slower in this substance than it is in vacuum.
  4. D) a ray of light is refracted away from the normal as it passes from air into glass.

32) Total internal reflection

  1. A) occurs when light strikes an interface at greater than the critical angle.
  2. B) accounts for the brilliance of cut diamonds.
  3. C) allows light to travel in a curved path inside an optic fiber.
  4. D) All of the answers are correct.

33) When monochromatic light passed through two slits arrive at a point on a screen out of phase,

  1. A) a dark region is produced.
  2. B) a bright region is produced.
  3. C) two different colors of light are observed.
  4. D) a region of polarized light is produced.

34) A prism separates the colors of sunlight into a spectrum because

  1. A) red light is refracted the most, while violet light is refracted the least.
  2. B) longer wavelengths are bent more than shorter wavelengths.
  3. C) each wavelength of light has its own index of refraction.
  4. D) it polarizes the different wavelengths of light.

35) Polarized light vibrates

  1. A) only in one plane.
  2. B) in two planes at right angles to one another.
  3. C) in all planes.
  4. D) not at all.


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