Answer: The frequency of the second harmonics is 168 Hz.
Explanation:
Fundamental frequency is the frequency associated with the ground state energy level. It is denoted by [tex]f_0[/tex]
Second harmonic frequency is the frequency associated with the second energy level where n = 2. It is denoted by [tex]f_1[/tex]
The relationship between fundamental and second harmonic frequency is:
[tex]f_1=2f_0[/tex]
We are given:
[tex]f_0=84Hz[/tex]
Putting value in above relationship, we get:
[tex]f_1=2\times 84=168Hz[/tex]
Hence, the frequency of the second harmonics is 168 Hz.
