Interference occurs with not onlylight waves but also all frequencies of electromagnetic waves and allother types of waves, such as sound and water waves. Suppose thatyour physics professor sets up two sound speakers in the front of yourclassroom and uses an electronic oscillator to produce sound waves ofa single frequency. When she turns the oscillator on (take this to be itsoriginal setting), you and many students hear a loud tone while otherstudents hear nothing. (The speed of sound in air is 340 m/s.) The professor once again returns the apparatus to its original setting, but now she adjusts the oscillator to produce sound waves of half the original frequency. What happens? (a) The students who originally heard a loud tone again hear a loud tone, and the students who originally heard nothing still hear nothing. (b) The students who originally heard a loud tone now hear nothing, and the students who originally heard nothing now hear a loud tone. (c) Some of the students who originally heard a loud tone again hear a loud tone, but others in that group now hear nothing. (d) Among the students who originally heard nothing, some still hear nothing but others now hear a loud tone.
Interference occurs with not only
light waves but also all frequencies of
other types of waves, such as sound and water waves. Suppose that
your physics professor sets up two sound speakers in the front of your
classroom and uses an electronic oscillator to produce sound waves of
a single frequency. When she turns the oscillator on (take this to be its
original setting), you and many students hear a loud tone while other
students hear nothing. (The speed of sound in air is 340 m/s.) The professor once again returns the apparatus to its original
setting, but now she adjusts the oscillator to produce sound waves
of half the original frequency. What happens? (a) The students who
originally
heard a loud tone again hear a loud tone, and the students
who originally heard nothing still hear nothing. (b) The students who
originally heard a loud tone now hear nothing, and the students who
originally heard nothing now hear a loud tone. (c) Some of the students
who originally heard a loud tone again hear a loud tone, but
others in that group now hear nothing. (d) Among the students who
originally heard nothing, some still hear nothing but others now hear
a loud tone.
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