Wave Amplitude

Mr. Anderson explains wave amplitude, the maximum displacement in a wave, using examples like tsunamis. He describes how amplitude changes as waves approach land and discusses sensors for early detection. The video covers longitudinal and transverse waves, showing how to measure amplitude in each. For transverse waves, amplitude is measured by displacement from equilibrium, while in longitudinal waves, it's determined by particle density. The video aims to help viewers understand graphical representations of wave amplitude.

What happens to the amplitude of a tsunami as it approaches land?

• It decreases due to longer wavelengths.

• It disappears completely.

• It remains constant regardless of the distance.

• It increases as the wavelength shortens.

How do scientists aim to provide early warnings for tsunamis?

• By tracking the direction of the wind.

• By observing the color of the ocean.

• By detecting changes in wave amplitude using sensors.

• By measuring the speed of the wave.

In a transverse wave, how is amplitude typically measured?

• By calculating the speed of the wave.

• By observing the color change in the wave.

• By measuring the height above or below equilibrium.

• By counting the number of particles.

What is a key difference between longitudinal and transverse waves?

• Transverse waves have no oscillations.

• Longitudinal waves have oscillations in the direction of the wave.

• Transverse waves move in the direction of the wave.

• Longitudinal waves have perpendicular oscillations.

How can the amplitude of a longitudinal wave be estimated?

• By measuring the wave's temperature.

• By observing the wave's color.

• By counting the number of particles in the crest and trough.

• By measuring the wave's speed.