Matter as a Wave

Which experiment provided direct evidence for the wave nature of electrons?

• Photoelectric effect

• Young's double-slit experiment

• Davisson-Germer experiment

• Compton scattering

How does the scale of an object influence whether its behavior is best described by classical mechanics or quantum mechanics?

• Macroscopic objects are described by quantum mechanics, while nanoscopic objects are described by classical mechanics.

• The de Broglie wavelength determines the appropriate description; larger wavelengths correspond to classical mechanics.

• Classical mechanics applies to macroscopic objects, and quantum mechanics applies to nanoscopic objects, with the de Broglie wavelength serving as a determinant.

• Wave-particle duality only applies to light, not to matter.

Why is the wave nature of macroscopic objects, such as a baseball, not readily observable?

• Their momentum is too low, resulting in an immeasurably large wavelength.

• Their mass is too large, leading to an extremely small de Broglie wavelength.

• They do not possess wave-particle duality.

• Planck's constant is not applicable to macroscopic phenomena.

Why do electron microscopes offer significantly higher resolution than optical microscopes?

• Electrons have a much higher energy than photons of visible light.

• The de Broglie wavelength of electrons can be made much smaller than the wavelength of visible light.

• Electrons are particles, allowing for more precise focusing.

• Electron beams do not experience diffraction.