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Sound & Light in Physics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. When the source of the sound is moving _____, the pitch is _____.

Question 2 2.

Use the following data to calculate the velocity of a object, given the doppler effect.

Actual frequency: 600 Hz

Observed frequency: 700 Hz

Wave velocity: 400 m/s

Observer's velocity: 0 m/s

Question 3 3. What is the wavelength of a sound wave with a frequency of 450 Hz? (Tip: The speed of sound in air is 330 m/s.)

Question 4 4. In more humid air, sound _____.

Question 5 5. White is the result of combining the wavelengths of _____.

Page 2

Question 6 6. All of the following statements are true, EXCEPT:

Question 7 7. What is the effect of brighter light in the photoelectric effect?

Question 8 8. Which of the following regions of the electromagnetic spectrum has the highest frequency?

Question 9 9. As the intensity of a wave _____, we hear them as _____.

Question 10 10. All of the following statements are true about sound and light, EXCEPT:

Page 3

Question 11 11. What is the energy carried by a photon of green light with a wavelength of 520 nm? (Plank's constant = 4.136 × 10-15 eV/Hz)

Question 12 12. The electromagnetic waves that cause sunburn are

Question 13 13. On the electromagnetic spectrum, radio waves have the _____ frequency and the _____ wavelength.

Question 14 14. Diffraction is the bending of waves when they

Question 15 15. Sounds in the _____ range are best for reflecting off of small objects.

Page 4

Question 16 16. Hiran is standing beside the road when he hears a bird flying AWAY from him and chirping. The bird's chirp has a frequency of 1800 Hz, and the bird is flying away from him at 6 m/s. What frequency does Hiran hear?

Question 17 17. Samira is riding on a bus moving at 14 m/s when she hears a whistle on the road ahead of her. If the whistle emits a 2400 Hz sound, what frequency sound does Samira hear? You can assume that the whistle is not moving and that the speed of sound in air is 350 m/s.

Question 18 18. Within a medium of the same state, wave speed, in general, increases with _____ temperature.

Question 19 19. Sound with a frequency of 950 Hz and a wavelength of 1 m will travel _____ kilometers in 5 minutes.

Question 20 20. Amplitude is a measure of how much _____ is being carried by a wave.

Page 5

Question 21 21. Which wave parameter is related to the pitch of a sound?

Question 22 22. As the frequencies of the pure spectral colors increase, the wavelengths of the colors:

Question 23 23. Which of the following is NOT a pure spectral color?

Question 24 24. Which of the following is an example of light behaving like a particle?

Question 25 25. Scientists questioned the wave theory of light when they saw that increasing the light intensity would only increase the _____ of emitted electrons.

Page 6

Question 26 26. Select the correct statement using the fact that red light has a frequency of about 430 trillion Hz and blue light has a frequency of about 630 trillion Hz.

Question 27 27. In the equation for the energy for a photon, E = hf, the h stands for:

Question 28 28. What is the energy of an AM radio wave with a frequency of 500 kHz (5 x 105 Hz)?

Question 29 29. What happens if electromagnetic radiation is shone upon a metal that has an energy lower than its work function?

Question 30 30. Which of the following has the highest energy?

Sound & Light in Physics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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