Question

If the ratio of maximum to minimum intensity in beats is 49, then the ratio of amplitudes of two progressive wave trains is

• A. 7 : 1
• B. 4 : 3
• C. 49 : 1
• D. 16 : 9

Answer 1

Answer: (B)

4 : 3

Answer 2

v = 350 m/sec

Dx = 2x = 2(8.75) =

l = 4 × 8.75 = 35.00 cm = 0.35 m

v = nl \ n = $\frac { 350 } { 0.35 }$ = 1000 Hz