Returning to the question of whether atomic particles behave like wave particles, light is the greatest example of how they behave like a wave. Wavelengths come in all shapes and sizes, from electrons with wavelengths of a trillionth of a meter to radio waves that can reach miles in length. The most specific point that quantum mechanics raises about light and wavelengths is their ability to pass through empty spaces, such as a door. You can see hints of light passing through the cracks and edges of a door because the wavelength-like properties bend easily and can move as they want. Another common application of quantum mechanics is the ability to use cell phones to communicate with people around the world. Because scientists were able to recognize that these waves were capable of carrying the signal to produce communication from anywhere, life became easier. If quantum mechanics were not studied so much, communication would be very difficult, making life extremely difficult. The use of communication is the greatest impact that the study of quantum mechanics has had on our lives