# Ripple Effect

Topics: Wave, Source, Interference Pages: 3 (783 words) Published: February 4, 2013
Ripple While You Work
Purpose: To observe wave phenomena in ripple tank (applet)
Directions:
Click on ripple tank applet
STEP ONE: Change the drop down window from 1 src, 1 frq to No sources Click the mouse at random in the window. You can increase the brightness if this helps. 1. Describe the shape of the pulse. Does the speed of the pulse seem to be the same in all directions? It is square ripples centered around the mouse and then they turn to circles. The ripples are even all the way around.

STEP TWO: Change the drop down window from No sources to 1 plane src, 1 freq. You can change the simulation speed and source frequency if you want. 2. What is the shape of the pulse? How is this different than your point source? It is circles immediately after being created from the source instead of starting out as squares and then becoming circles. STEP THREE: Change the setup to obstacle.

3. What does the pulse do when it reaches the obstacle? What does the pulse do when after it hits the barrier? It is directeed around the obstacle and after the obstacle it begins to go back to the center or behind the obstacle.

STEP FOUR: Keep the obstacle, but have No Sources.
4. Click at random. How do the pulses reflect off the obstacle? It is directeed around the obstacle and after the obstacle it begins to go back to the center or behind the obstacle.

STEP FIVE: PLAY AROUND but try to answer these questions.
5. What happens to waves when they encounter obstacles of different shapes? Why do you think that happens? Well, there is more ripple interference and the shape remains circles but not perfect circle ripples all around. This happens because they are reflected off of different shaped objects and not just flat objects sending the ripples in multiple directions. 6. How does the wave pattern for a single slit vs. a double slit compare? Why do you think that happens? They are very similar but the the single...