Pre Lab 3¶

Help for Pre lab 3 is here!

Part 1¶

Now, I want you to answer this questions: Are the ends of a vibrating rod considered nodes or antinodes?

If you do not know, I suggest going back to your lecture note on Sound Wave.

Tip

Are there fixed boundaries in this case? What the presence of fixed boundaries mean to your wave pattern?

Part 2¶

Two longest wavelength that can fit in this rod is equivalent to two minimum number of nodes that can be formed within this rod’s length.
Your sketch will depends on your answer for part 1. This illustration might give you a sense of what your base case looks like.

Antinodes at 2 ends	Nodes at two ends

Now, you are asked where to hold the rod to produce 2 wave patterns you just draw. It is pretty easy if you know what holding is for.

Tip

Holding is to force a node at that point!

Lab 3 Lab 4