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

Here is Your Answer

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

Answer :- 4 : 3

Hope it Heplfull Answer

Answer 2

Answer:

B) 4:3

Explanation:

Ratio of maximum to minimum intensity in beats = 49 (Given)

Thus, by the equation -

Imax/Imin = (a+b)²/ (a-b)²

= (a+b)²/ (a-b)² = 49

Therefore a+b/a-b = 7

= 7a-7b = a+b

= 6a = 8b

= a/b = 6/8

= 4/3

= 4:3

Therefore, the ratio of amplitudes of two progressive wave trains is 4:3.