Interference: Two light sources are said to be coherent if they are
A. of the same frequency.
B. of the same frequency, and maintain a constant phase difference.
C. of the same amplitude, and maintain a constant phase difference.
D. of the same frequency and amplitude.
Answer: B
You might also like to view...
The time for one complete cycle of a periodic process to take place is called the __________
Fill in the blank(s) with correct word
A 0.40-kg mass attached to the end of a string swings in a vertical circle having a radius of 1.8 m. At an instant when the string makes an angle of 40 degrees below the horizontal, the speed of the mass is 5.0 m/s. What is the magnitude of the tension in the string at this instant?
A. 9.5 N B. 3.0 N C. 8.1 N D. 5.6 N E. 4.7 N
____________________ waves are seismic waves that do not travel through Earth's liquid core
Fill in the blank(s) with correct word
If the Sun collapsed to a neutron star or black hole, Earth would
1) spiral into the Sun's core, 2) remain in its present orbit, 3) spiral away from the Sun, 4) itself undergo collapse, for the variable that changes in Newton's gravitational equation is 5) distance. 6) the mass of the Sun. 7) the mass of Earth. 8) all of these. 9) none of these.