Which of the Following Statement(s)is(are)true About the Frequency of a Stretching

Multiple Choice

Which of the following statement(s) is(are) true about the frequency of a stretching vibration according to Hook's law?

A) it is directly proportional to strength of the bond & the reduced mass
B) it is inversely proportional to strength of the bond & the reduced mass
C) it is directly proportional to strength of the bond
D) it is inversely proportional to the reduced mass
E) C & D