Try to shorten the long string and talk once again with one of your family members, how did the length of the string affect the quality of the sound produced?

Explanation:

The length of the string determines the frequency of the sound waves. Shorter length strings will cause the string to vibrate faster which causes faster frequency and a higher pitch. Longer length strings have the opposite effect, in which frequency is slowed down causing lower pitch. This higher pitch creates a perceived brightness of the sound which can be categorized as being a better sound quality than that of a lower-pitched message. Therefore, we can say that yes, it does affect the sound produced.

snell's law

refractve index = sin incidence / sin refraction

80cm/s.

24cm/s.

53.3cm/s.