1. Two sources S1 and S2 oscillating in phase emit sinusoidal waves.
Q35.1
Two sources S1 and S2 oscillating in phase emit sinusoidal waves.
Point P is 7.3 wavelengths from source S1 and 4.3 wavelengths from source S2. As a result, at point P there is
A. constructive interference.
B. destructive interference.
C. neither constructive nor destructive interference.
D. not enough information given to decide
Answer: A

2. A35.1
Two sources S1 and S2 oscillating in phase emit sinusoidal waves.
Point P is 7.3 wavelengths from source S1 and 4.3 wavelengths from source S2. As a result, at point P there is
A. constructive interference.
B. destructive interference.
C. neither constructive nor destructive interference.
D. not enough information given to decide

3. Two sources S1 and S2 oscillating in phase emit sinusoidal waves.
Q35.2
Two sources S1 and S2 oscillating in phase emit sinusoidal waves.
Point P is 7.3 wavelengths from source S1 and 4.6 wavelengths from source S2. As a result, at point P there is
A. constructive interference.
B. destructive interference.
C. neither constructive nor destructive interference.
D. not enough information given to decide
Answer: C

4. A35.2
Two sources S1 and S2 oscillating in phase emit sinusoidal waves.
Point P is 7.3 wavelengths from source S1 and 4.6 wavelengths from source S2. As a result, at point P there is
A. constructive interference.
B. destructive interference.
C. neither constructive nor destructive interference.
D. not enough information given to decide

5. A. The bright areas move closer together.
Q35.3
In Young’s experiment, coherent light passing through two slits (S1 and S2) produces a pattern of dark and bright areas on a distant screen. If the wavelength of the light is increased, how does the pattern change?
A. The bright areas move closer together.
B. The bright areas move farther apart.
C. The spacing between bright areas remains the same, but the color changes.
D. any of the above, depending on circumstances
E. none of the above
Answer: B

6. A35.3
In Young’s experiment, coherent light passing through two slits (S1 and S2) produces a pattern of dark and bright areas on a distant screen. If the wavelength of the light is increased, how does the pattern change?
A. The bright areas move closer together.
B. The bright areas move farther apart.
C. The spacing between bright areas remains the same, but the color changes.
D. any of the above, depending on circumstances
E. none of the above

7. B. three half-wavelengths C. three quarter-wavelengths
In Young’s experiment, coherent light passing through two slits (S1 and S2) produces a pattern of dark and bright areas on a distant screen.
What is the difference between the distance from S1 to the m = +3 bright area and the distance from S2 to the m = +3 bright area?
A. three wavelengths
B. three half-wavelengths
C. three quarter-wavelengths
D. not enough information given to decide
Answer: A

8. A35.4
In Young’s experiment, coherent light passing through two slits (S1 and S2) produces a pattern of dark and bright areas on a distant screen.
What is the difference between the distance from S1 to the m = +3 bright area and the distance from S2 to the m = +3 bright area?
A. three wavelengths
B. three half-wavelengths
C. three quarter-wavelengths
D. not enough information given to decide

9. Q35.5 A
Two radio antennas radiating in phase are located at points A and B, which are 6 wavelengths apart. A radio receiver is moved along a line from point B to point C. 6l B C
At what distances from point B will the receiver detect an intensity maximum?
4.5l 8l
C. 9l
D. both A. and B.
E. all of A., B., and C.
Answer: D

10. A35.5 A
Two radio antennas radiating in phase are located at points A and B, which are 6 wavelengths apart. A radio receiver is moved along a line from point B to point C. 6l B C
At what distances from point B will the receiver detect an intensity maximum?
4.5l 8l
C. 9l
D. both A. and B.
E. all of A., B., and C.

11. Q35.6
An air wedge separates two glass plates as shown. Light of wavelength l strikes the upper plate at normal incidence. At a point where the air wedge has thickness t, you will see a bright fringe if t equals
l/2.
3l/4.
C. .
D. either A. or C.
E. any of A., B., or C.
Answer: B

12. A35.6
An air wedge separates two glass plates as shown. Light of wavelength l strikes the upper plate at normal incidence. At a point where the air wedge has thickness t, you will see a bright fringe if t equals
l/2.
3l/4.
C. .
D. either A. or C.
E. any of A., B., or C.