Waves, Light and Sound - Physics 101 / AP Physics 1 Review with Dianna Cowern

The video explores the nature of waves, using a slinky to demonstrate wave propagation. It distinguishes between longitudinal and transverse waves, explaining how sound and light travel. Key wave properties like frequency, wavelength, and amplitude are discussed, along with the wave equation. The video also covers the speed of sound and light, and how waves interact with matter, including refraction and the Doppler effect. The lesson concludes with a brief history of the universe's expansion and the concept of dark energy.

What happens to the speed of a wave in a slinky when you push harder?

• The wave moves slower.

• The wave disappears.

• The wave speed remains the same.

• The wave moves faster.

Which type of wave involves particles moving parallel to the direction of energy travel?

• Electromagnetic wave

• Transverse wave

• Longitudinal wave

• Surface wave

What is the term for the time it takes for a wave to return to its starting point?

• Amplitude

• Period

• Frequency

• Wavelength

Which property of a wave is measured in Hertz?

• Wavelength

• Amplitude

• Period

• Frequency

What is the relationship between wavelength and frequency in the wave equation?

• They are equal.

• They are unrelated.

• They are inversely proportional.

• They are directly proportional.

Why do radio antennas need to be large?

• To reduce interference.

• To capture more energy.

• To pick up longer wavelengths.

• To increase signal speed.

What happens to light when it enters a denser medium like water?

• It remains unchanged.

• It disappears.

• It slows down and bends.

• It speeds up.

What is the effect called when the frequency of a wave changes due to the motion of the source?

• Interference

• Doppler effect

• Diffraction

• Refraction

What does a red shift in light from a star indicate?

• The star is stationary.

• The star is moving towards us.

• The star is changing color.

• The star is moving away from us.

What is the term for the energy causing the universe to expand faster?

• Electromagnetic force

• Dark energy

• Dark matter

• Gravitational force