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Light and Sound Energy
Quizlet for Mr. Skold's Science Test on January 24
Terms in this set (23)
What are some indicators of sound energy?
Movement (vibrations) and hearing sound.
What are some indicators of light energy?
Seeing light, coloring, and feeling heat.
Define Mechanical Wave. What is an example of a mechanical wave in motion?
A transfer of energy through a medium without a transfer of medium. Seeing a crowd "wave" in a sports stadium is an example.
The material through which a mechanical wave travels.
What are two examples of waves? Describe or define them.
Transverse waves are waves that cause the medium to vibrate in a direction perpendicular to the direction the wave travels.
Longitudinal waves are waves that cause the medium to vibrate in a direction parallel to the direction the wave travels.
What kind of waves are light waves?
What kind of waves are sound waves?
What is the frequency of a wave?
The number of crests or compressions in a wave that pass a point per unit of time.
What is the period of a wave?
The time required to complete one full wavelength.
What is the relationship between distance and sound energy?
As distance increases, sound energy decreases.
What is the relationship between vibrations and sound energy?
As vibrations increase, sound energy increases.
What is the relationship between distance and light energy?
As distance increases, light energy decreases.
What is the relationship between intensity and light energy?
As intensity (brightness) increases, light energy increases.
What are two models we can use to view light energy?
Light can be seen both as a particle (Photons) and a wave.
What is a photon?
A single packet of light.
Light and sound are best described as what kind of energy?
What is a reflection? Give an example of sound and light reflection?
When the medium energy is turned back from a hard surface. Reflection in a mirror and an echo are two examples.
What is diffraction?
The ability of a wave to spread out or change direction as it passes through an opening or around an obstruction. Hearing a sound even though your ears are covered is an example.
What is refraction?
The change in direction of a wave when it enters a new medium with a different speed. Light traveling through water and distorting the image of a pencil is an example.
What is electromagnetic radiation?
Radiant energy that can travel through a space without matter and through matter in the form of waves.
Describe the relationship between a sound's pitch and sound energy.
As pitch goes up, sound energy increases.
Describe the relationship between the amplitude of a wave and sound energy.
As amplitude increases, sound and light energy increases.
What is dispersion?
The spreading out of energy as it travels away from the source of energy.
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