Question

The sound waves are reflected from an

obstacle into the same medium from

which they were incident. Which of the

following changes​
a) speed b) frequency
c) wavelength d) none of these

Answer 1

the answer of this question is (b) frequency

Answer 2

Answer:

none of these

Explanation:

sound waves obey the rule of reflection which is same as light waves,

so,if it is in a different medium its wavelength,frequency,speed changes

C=LAMDA*frequency

hence this depends