Why is snow white?

To answer this question, not necessarily you must be a scientist. You may want to try to understand?
When the sun's rays into a particle of snow, it will soon be scattered by a multitude of ice crystals and air pockets inside. Nearly all of the light being bounced back and out of the snow particles. So keep the snow light color of sun - white.

So, what light is and how the phenomenon of light scattering?
Light is a collection of countless photons. Photon our eyes to form a "rainbow strip" which physicists call a spectrum. The spectrum is very colorful, but basically there are 7 colors red, orange, yellow, green, blue, indigo, violet through space with shorter wavelengths, while the photon of the range of colors, "hot" than then transmitted to our eyes with longer wavelengths. Sunlight is the sum of all the colors that, but it is not brilliant as you thought it only has only one color - white.
When photons collide with any object that they would have very diverse responses.We can bounce back (physical terms is reflected), can shoot out the side (scattering), or even we can go in a straight line (the transmission of light). One possibility is that the photons will be "slammed" into a molecule of the substance into the body, transmitting energy to the molecules and "death" (absorption). The photons of different stripes have different responses depending on the object where it collided.So you can understand this simple explanation: Western red apple red because it absorbs most light "hot", mainly red light, in the spectrum. Light green, blue, indigo, violet "weak" rather than being bounced back (so can not have blue apple, unless someone ... dye it).
So everything becomes simple