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.