Sound Waves, Nature of Light

Which of the following best describes the nature of light?

• Light is both a wave and a particle.

• Light is a wave.

• Light is a particle.

• Light is neither a wave nor a particle.

Tags

NGSS.HS-PS4-3

Light exhibits certain behaviors that are characteristic of any wave and would be difficult to explain with a purely particle-view. Which of the following are examples of this behavior? CHOOSE ALL THAT APPLY!

• Light reflects in the same manner that any wave would reflect.

• Light refracts in the same manner that any wave would refract.

• Light undergoes interference in the same manner that any wave would interfere.

• Light exhibits the Doppler effect just as any wave would exhibit the Doppler effect.

Which of the following IS NOT true of the phenomenon of "wave interference"?

• Constructive interference occurs at any location along the medium where the two interfering waves have a displacement in the opposite direction.

• Wave interference is a phenomenon that occurs when two waves meet while traveling along the same medium.

• The interference of waves causes the medium to take on a shape that results from the net effect of the two individual waves upon the particles of the medium.

• Wave interference can be constructive or destructive in nature.

Which of the following IS NOT a human-induced crisis that is currently threatening the Earth and its inhabitants?

• threat of impact from meteoroids and comets

• over-population

• climate change

• pollution

• ocean acidification

Which f the following statements is most accurate?

• Human hunger is mostly caused by failures in getting the food to the people.

• The Earth cannot produce enough food to feed all of its peoples.

• Wasting food in the USA is not related to people starving in Africa.

• The Earth will always be able to supply enough food to feed the population.

In what year was the first Earth Day celebrated?

• 1970

• 1995

• 2005

• 1776

A sound wave is created as a result of a ______________ object.

• vibrating

• stationary

• compressed

• longitudinal

All objects have a natural frequency or set of frequencies at which they vibrate.

• True

• False

A _______________ tends to vibrate at a single frequency, producing a very pure tone.

• flute

• tuba

• human voice

• bell

Sounds cannot be heard in outer space because sound waves require a medium, such as air or water, to travel through.

• True

• False