Physics Made Easy

Electron microscopes use the wave properties of electrons to illuminate objects the same way light does. It can resolve smaller objects since it has a smaller wavelength than visible light.

Diffraction is a wave property. It the ability to bend around edges. The illuminated door frame around a doorway is an example of diffraction. That’s how the cells underneath are illuminated.

Superposition is a wave property. It creates brighter and darker areas through constructive and destructive interference. That’s what give depth in the image.

Albert Einstein presented his dissertation on July 20 in 1905 at the University of Zurich.

Shortly after, he published four papers that presented revolutionary ideas, including the Theory of Special Relativity and the Light Quanta Hypothesis. Einstein was awarded the 1921 Nobel Prize in Physics "for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect."