1. Universe Tenth Edition Chapter 5 The Nature of Light Roger Freedman Robert Geller William Kaufmann III Clicker Questions

2. How long does it take light to travel 3 × 10 8 m? A.1 year B.8 minutes C.1 minute D.1 second E.1 millisecond Q5.1

3. How long does it take light to travel 3 × 10 8 m? A.1 year B.8 minutes C.1 minute D.1 second E.1 millisecond A5.1

4. Which of the following indicates that light behaves as a wave? A.Alternating bright and dark bands appear on a screen when light of a single color passes through two slits that are side by side. B.Light travels at 3 × 10 8 m/s. C.Light bounces off mirrors. D.Light consists of photons. E.Light can travel to Earth from the most distant parts of the universe. Q5.2

5. Which of the following indicates that light behaves as a wave? A.Alternating bright and dark bands appear on a screen when light of a single color passes through two slits that are side by side. B.Light travels at 3 × 10 8 m/s. C.Light bounces off mirrors. D.Light consists of photons. E.Light can travel to Earth from the most distant parts of the universe. A5.2

6. The frequency of light is A.the number of wave crests passing a point per second. B.another name for the speed of light. C.the time it takes light to travel across the solar system. D.a measure of the brightness of the light. E.a measure of the intensity of the light. Q5.3

7. The frequency of light is A.the number of wave crests passing a point per second. B.another name for the speed of light. C.the time it takes light to travel across the solar system. D.a measure of the brightness of the light. E.a measure of the intensity of the light. A5.3

8. A light source has a wavelength of 1 × 10 −6 m. What is its frequency? Assume c = 3 × 10 8 m/s. A.0.33 × 10 -14 Hz B.3 × 10 2 Hz C.3 × 10 14 Hz D.3 × 10 6 Hz E.0.003 Hz Q5.4

9. A light source has a wavelength of 1 × 10 −6 m. What is its frequency? Assume c = 3 × 10 8 m/s. A.0.33 × 10 -14 Hz B.3 × 10 2 Hz C.3 × 10 14 Hz D.3 × 10 6 Hz E.0.003 Hz A5.4

10. A radio source has a frequency of 2 × 10 5 Hz. What is its wavelength? Assume c = 3 × 10 8 m/s. A. 0.67 × 10 −3 m B.1.5 × 10 3 m C.6 × 10 13 m D.0.16 × 10 −13 m E.1.5 × 10 13 m Q5.5

11. A radio source has a frequency of 2 × 10 5 Hz. What is its wavelength? Assume c = 3 × 10 8 m/s. A. 0.67 × 10 −3 m B.1.5 × 10 3 m C.6 × 10 13 m D.0.16 × 10 −13 m E.1.5 × 10 13 m A5.5

12. A light source has a frequency of 2 × 10 13 Hz. What region of the electromagnetic spectrum is it in? A.gamma ray B.ultraviolet C.visible D.infrared E.microwave Q5.6

13. A light source has a frequency of 2 × 10 13 Hz. What region of the electromagnetic spectrum is it in? A.gamma ray B.ultraviolet C.visible D.infrared E.microwave A5.6

14. Light has a particle nature, and these particles are called photons. Which region of the electromagnetic spectrum has the highest energy photons? A.gamma ray B.X-ray C.ultraviolet D.visible E.infrared Q5.7

15. Light has a particle nature, and these particles are called photons. Which region of the electromagnetic spectrum has the highest energy photons? A.gamma ray B.X-ray C.ultraviolet D.visible E.infrared A5.7

16. Which of the following objects emits a continuous spectrum in which light is present at all wavelengths? A.The filament of a light bulb B.The low-density neon gas in an overhead sign C.A single atom that emits light when an electron jumps from a higher state to a lower state D.Light from a low-density nebula heated by a nearby star E.All of the above Q5.8

17. Which of the following objects emits a continuous spectrum in which light is present at all wavelengths? A.The filament of a light bulb B.The low-density neon gas in an overhead sign C.A single atom that emits light when an electron jumps from a higher state to a lower state D.Light from a low-density nebula heated by a nearby star E.All of the above A5.8

18. Isolated atoms, such as atoms in a low-density gas cloud, only emit light at certain wavelengths. Why? A.They cannot be made hot enough to emit at all wavelengths. B.The electrons in the atom are allowed to have any energy. C.The electrons in the atom are allowed to have only certain energies. D.There is a nucleus, which modifies the properties of the light after it is emitted. E.The atoms are isolated from one another. Q5.9

19. Isolated atoms, such as atoms in a low-density gas cloud, only emit light at certain wavelengths. Why? A.They cannot be made hot enough to emit at all wavelengths. B.The electrons in the atom are allowed to have any energy. C.The electrons in the atom are allowed to have only certain energies. D.There is a nucleus, which modifies the properties of the light after it is emitted. E.The atoms are isolated from one another. A5.9

20. What type of spectrum is shown in the figure? A.Emission B.Absorption C.Reflection D.Refraction E.Continuous Q5.10

21. What type of spectrum is shown in the figure? A.Emission B.Absorption C.Reflection D.Refraction E.Continuous A5.10

22. A blackbody A.is a body that is black in color. B.absorbs all the light incident on it. C.reflects all the light incident on it. D.is a body at very low temperature. E.cannot emit any radiation whatsoever. Q5.11

23. A blackbody A.is a body that is black in color. B.absorbs all the light incident on it. C.reflects all the light incident on it. D.is a body at very low temperature. E.cannot emit any radiation whatsoever. A5.11

24. Which of the following explains why zero degrees Kelvin (0 K or −273 °C) is the absolute zero of temperature? A.Our present-day technology does not allow us to go any lower than this temperature. B.It is arbitrary because temperature must be measured with respect to a zero point. C.It is the lowest temperature found so far by space probes in our solar system. D.It the temperature approached as atomic motion reaches its slowest possible value. E.Because 273 K = 0 °C. Q5.12

25. Which of the following explains why zero degrees Kelvin (0 K or −273 °C) is the absolute zero of temperature? A.Our present-day technology does not allow us to go any lower than this temperature. B.It is arbitrary because temperature must be measured with respect to a zero point. C.It is the lowest temperature found so far by space probes in our solar system. D.It the temperature approached as atomic motion reaches its slowest possible value. E.Because 273 K = 0 °C. A5.12

26. The star Betelgeuse has a surface temperature of approximately 3500 K. At what wavelength does it emit the most radiation? A.10.1 m B.1.2 × 10 6 m C.8.3 × 10 −7 m D.9.8 × 10 −2 m E.8.3 m Q5.13

27. The star Betelgeuse has a surface temperature of approximately 3500 K. At what wavelength does it emit the most radiation? A.10.1 m B.1.2 × 10 6 m C.8.3 × 10 −7 m D.9.8 × 10 −2 m E.8.3 m A5.13

28. Which set of lines in the diagram correspond to electron transitions that emit light in the visible range? A.Lyman series B.Balmer series C.Paschen series D.Absorption E.Emission Q5.14

29. Which set of lines in the diagram correspond to electron transitions that emit light in the visible range? A.Lyman series B.Balmer series C.Paschen series D.Absorption E.Emission A5.14

30. A source of light moves toward you. According to the Doppler effect A.the frequency of the light will increase. B.the frequency of the light will decrease. C.the wavelength of the light will increase. D.the velocity of the light will increase. E.nothing changes. Q5.15

31. A source of light moves toward you. According to the Doppler effect A.the frequency of the light will increase. B.the frequency of the light will decrease. C.the wavelength of the light will increase. D.the velocity of the light will increase. E.nothing changes. Q5.15