Unit 8 Quiz 2 Practice Questions


1. The diagram below shows straight wave fronts passing through an opening in a barrier.


This wave phenomenon is called
reflection refraction polarization diffraction

2. The diagram below shows two sources, A and B, vibrating in phase in the same
uniform medium and producing circular wave fronts.


Which phenomenon occurs at point P ?
destructive interference constructive interference reflection refraction

Questions 3 and 4 : A wave generator located 4.0 m from a reflecting wall produces a standing wave in a string.


3. If the speed of the wave is 10. m/s, what is its frequency ?
0.40 Hz 5.0 Hz 10. Hz 40. Hz

4. How many nodes are there in the standing wave ?
2 3 4 5

5. The diagram below shows two pulses, each of length l, traveling toward each other
at equal speed in a rope.


Which diagram best represents the shape of the rope when both pulses are in region AB ?
(1) (2) (3) (4)

6. The diagram below shows two sources generating waves in a ripple tank.


What is occuring along line A ?
destructive interference along a nodal line destructive interference along an antinodal line
constructive interference along a nodal line constructive interference along an antinodal line

7. Maximum desctructive interference occurs when the phase difference between two waves is
0o 90o 180o 270o

8. A standing wave results from two waves traveling in opposite directions with
equal amplitudes only equal frequencies only equal amplitudes and frequencies

9. The spreading of a wave behind an obstacle is called
reflection refraction diffraction interference

10. Maximum constructive interference between two waves of the same frequency could occur when their
phase difference is one wavelength phase difference is 1/2 wavelength
phase difference is 3/2 wavelength phase difference is 1/4 wavelength

11. What is the straight-line distance between nodes in a standing wave ?
one wavelength two wavelengths 1/2 wavelength 1/4 wavelength

12. In a ripple tank, as the frequency of the wave source increases, the amount of diffraction observed
decreases increases remains the same

13. Light from the star Betelgeuse displays a Doppler red shift. This shift is best explained by assuming that
Betelgeuse is
decreasing in temperature increasing in temperature moving toward Earth moving away from Earth

14. The diagram below shows an antenna emitting an electromagnetic wave.


In what way did the electrons in the antenna produce the electromagentic wave ?
by remaining stationary by moving at constant speed upward, only
by moving at constant speed downward, only by accelerating alternatively upward and downward

15. Which diagram best represents light emitted from a coherent light source ?


(1) (2) (3) (4)

16. In a vacuum, all electromagnetic waves have the same
wavelength frequency speed amplitude

17. Compared to the wavelength of red light, the wavelength of yellow light is
shorter longer the same

18. Which of the following colors has the lowest frequency ?
red yellow blue violet

19. A monochromatic beam of light has a frequency of 6.5 x 1014 Hz. What color is the light ?
yellow orange violet blue

20. What is the wavelength of X-rays with a frequency of 1.5 x 1018 Hz traveling in a vacuum ?
4.5 x 1026 m 2.0 x 10-10 m 5.0 x 10-10 m 5.0 x 109 m

21. Which of the following forms of electromagnetic energy has the highest frequency ?
radio ultraviolet infrared visible light

22. In a double-slit experiment, which color will produce the largest distance between maxima ?
red yellow blue violet

23. Which phenomenon can occur with light, but not with sound ?
interference polarization refraction the Doppler effect

24. The fact that light can be polarized lead to the conclusion that light is a
particle compressional wave torsional wave transverse wave

25. Sound waves cannot be
refracted diffracted reflected polarized

26. The phenomenon observed in a double-slit experiment are caused by
reflection and refraction reflection and polarization diffraction and interference diffraction and polarization

27. Which characterizes a polarized wave ?
vibrating in all directions vibrating at random vibrating in one plane vibrating in circles

28. If you shine laser light at a penny and project the image on the wall, you will notice a bright spot
directly behind the penny. This can be explained by assuming that the light waves experienced
diffraction only interference only diffraction and interference refraction only