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D) Matter Waves - ALL moving particles have wave properties.

λ = h/p = h/mv

p = momentum of the particle

λ - called DeBroglie Wavelength

The wavelength of ordinary objects are insignificant because their masses are too large.

BUT…

 Electrons are small enough

to have wave behavior.

In 1927 Diffraction and interference patterns were observed for electrons.

A scientist passed electrons through tiny double slits and observed interference patterns

Wave Nature of Electrons - whatthebleep.com

Final Summary
 

IS LIGHT A WAVE OR A PARTICLE?

Light behaves like a wave in interaction with large objects and like particle with very small objects like electrons
 

Early Models of Atoms