A mixture is an amalgamation of two or more materials, and each has its own chemical identity; however, a chemical reaction does not occur. If you mix salt and sand or sugar and water, their identities will stay the same. Mixtures are used in scientific settings and baking, and there are three different types of mixtures: solution, colloid, and suspension.
Reflection is mirrored light from a mirror or a pool of water, and this is not limited to visual or light reflection; water, sound, particle, and seismic waves can also be reflected. No matter what type of reflection, it is caused by an abrupt change in the wave's direction that hits between different forms.
Unlike reflection, refraction is caused by a difference in the wave's speed because it passes through one or more different mediums. An example would be that if you have a glass of water and put a straw into the water, it will appear bent when you look through the glass's contents. This directional change is because light waves move faster through the air, and when they have to go through the water, they are skewed to a different direction.