For which of the following physical discoveries is Arthur Compton credited?
• The more precisely the position of an electron is determined, the less precisely the momentum of the electron is known at a given time.
• The scattering of x-rays by electrons in graphite further demonstrates that light can exhibit particle-like characteristics.
• The positive charge within an atom is concentrated within a very small volume within an atom.
• A low pressure monatomic gas can be made to emit electromagnetic waves viewed as a series of specific bright fringes.
• The circumference of an electron’s orbit in an atom is an integer multiple of the electron’s wavelength.