Expert: Ed - 3/11/2006

Question
My science project is about the phases of the moon- so it also involves light and the reflection.

In my research I found that light might be a particle, or a wave or both.

1. Which do you think light is?

What experiment or person's work would you cite?

2. What do you think the Double Slit experiment demonstrated?

what experiment or person's work would you cite?

Answer
Aaron,
Light should be considered to behave as BOTH a particle, and a wave.  If you try to say that it's just one or the other in your science project, your teacher will take points off your grade.

You should cite Young and Fresnel's double slit experiment, as proof of Huygens' wave theory of light.  Also, Einstein and Newton did work which emphasized the idea that light could be seen as particles (although that doesn't mean that it should ONLY be considered particles, because it's also a wave).

http://en.wikipedia.org/wiki/Wave-particle_duality

I hope this is helpful.  Keep Looking Up!
--Ed