The next three questions (#12 through #14) focus on two classroom demonstrations of wave behaviors.
Read the information below and use it to answer the selected-response questions and constructed-response question that follow.
Students in a physics class studied wave behaviors by observing different types of waves in two demonstrations.
Demonstration 1
For demonstration 1, the students observed waves in a ripple tank, which is a container with a glass bottom. The ripple tank was filled with a couple inches of water. The waves were generated by a paddle that moved up and down in the water. The students could adjust the frequency of the paddle’s movement. A light above the tank created shadows of the waves on the floor. Each wave crest made a dark shadow, while each wave trough made a light shadow. The setup for demonstration 1 is shown.
Demonstration 2
For demonstration 2, the students directed red light from a laser pointer at a block of glass. The red light had a frequency of 4 x 1014 Hz. The path of the light as it traveled through the block is represented in the diagram.
Which of the following describes the waves in both demonstrations 1 and 2? |
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