Question

If the ratio of amplitude of two waves is 4 : 3, then the ratio of maximum and minimum intensity is
(a) 16 : 18(b) 18 : 16(c) 49 : 1(d) 94 : 1

Answer 1

c. 49:1 is the ans.

Answer 2

Answer:

The correct answer is 49:1.

Explanation:

This can be determined using the following simplified formula:

Maximum intensity/ Minimum intensity ( Imax/Imin) =[ ( a1+a2)/ (a1-a2) ]^2, where a1 is the first amplitude and a2 is the second amplitude

Now putting the values of a1 and a2 in the formula:

Imax/ Imin=[ (4+3)/(4-3) ]^2= 49:1