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" ... This illustration, of light passing through a dispersive prism and separating into clearly defined ... [+] colors, is what happens when many medium-to-high energy photons strike a crystal. If we struck this prism with a single photon and space were discrete, the crystal could only possibly move a discrete, finite number of spatial steps, but only a single photon would either reflect or transmit. ... "
" ... This illustration, of light passing through a dispersive prism and separating into clearly defined... [+] colors, is what happens when many medium-to-high energy photons strike a crystal. Note how in a vacuum (outside of the prism) all light travels at the same speed, and does not disperse. However, as bluer light slows down more than redder light, the light that passes through a prism is successfully dispersed. ... "