Let’s say we can hear a beat frequency of 2Hz from two tuning forks. The first tuning fork has a frequency of 100Hz. If wax is applied on the 2nd tuning fork, the beat frequency becomes 4Hz, what is the frequency of the 2nd tuning fork?
(a) 100Hz
(b) 98Hz
(c) 106Hz
(d) 104Hz
I have been asked this question in an online interview.
My doubt is from Waves in portion Waves of Physics – Class 11