Question

The diagrams below represent 5 different standing sound waves set up inside of a set of organ pipes 1 m long.

What is the length of the longest wavelength shown?

A) 0.5 m 

B) 0.75 m 

C) 1 m 

D) 2 m 

E) 4 m

Answer 1

The correct option is: (E) 4 m

Explanation:

Cx is only ¼ of a wavelength. To make a full wavelength you would need 4x the current length.