Light and Waves

Trough: The lowest point of a transverse wave. In a compressional wave, the trough is the area of greatest rarefaction.

• The highest point of a transverse wave

• The area of greatest compression in a compressional wave

• The area of greatest rarefaction in a compressional wave

• The midpoint of a transverse wave

Dolphins use sonar to navigate and communicate.

• Dolphins use reflected sound waves to navigate and communicate in their environment.

• Dolphins use visual signals to navigate and communicate.

• Dolphins rely on chemical signals to navigate and communicate.

• Dolphins use electric fields to navigate and communicate.

Opaque matter reflects or absorbs all light.

• Opaque objects cast shadows because they do not allow light to pass through.

• Opaque objects allow light to pass through easily.

• Opaque matter is transparent to all wavelengths of light.

• Opaque objects emit light in all directions.

Translucent matter allows some light to pass through, but some light is blocked or bent in a different direction.

• Translucent matter completely blocks light.

• Translucent matter partially transmits light, creating a diffused effect.

• Translucent matter allows all light to pass through without any obstruction.

• Translucent matter reflects all light that hits it.

High Frequency: Waves with shorter wavelengths transfer greater energy.

• True

• False

• Waves with longer wavelengths transfer greater energy.

• Waves with shorter wavelengths transfer less energy.

Frequency is measured in Hertz.

• Kilohertz (kHz)

• Megahertz (MHz)

• Hertz (Hz)

• Gigahertz (GHz)

Low frequency waves have longer wavelengths and transfer less energy.

• Low frequency waves have shorter wavelengths and transfer more energy.

• Low frequency waves are characterized by longer wavelengths and lower energy transfer compared to high frequency waves.

• Low frequency waves have the same energy transfer as high frequency waves.

• Low frequency waves are characterized by shorter wavelengths and lower energy transfer compared to high frequency waves.

A wave is a disturbance that transfers energy from one point to another.

• Waves involve the movement of particles, which is called vibrations.

• Waves are only found in water bodies.

• Waves can only travel through solids.

• Waves do not transfer energy.

Compressional wave: Matter moves back and forth as the wave travels through it. Example: Vibrations of spring coils produce a compression.

• Vibrations of spring coils produce a compression.

• Water waves moving in a circular motion.

• Light waves traveling through a vacuum.

• Sound waves traveling through air.

The Doppler Effect changes a sound's pitch when the source or listener is moving.

• The Doppler Effect describes how a sound's pitch appears to change when the source or listener is in motion, such as the sound of an ambulance siren.

• The Doppler Effect only occurs with light waves, not sound waves.

• The Doppler Effect is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.

• The Doppler Effect is a phenomenon that only affects visual perception.