spectrum image or apparition Roger Bacon Light intensity
单色仪的应用 • spectrum : "image" or "apparition “ • Roger Bacon • Light intensity or power, frequency or wavelength • Sound waves • Any signal The spectrum in a rainbow White light dispersed by a prism into the colors of the optical spectrum
单色仪的应用 Nectar of camellia Rough plot of Earth's atmospheric transmittance (or opacity) to various wavelengths of electromagnetic radiation, including visible light.
衍射光强分布测量 Colors seen in a spider web are partially due to diffraction, according to some analyses The intensity pattern formed on a screen by diffraction from a square aperture
History Diffraction: diffringere Grimaldi, 1665 Newton, inflexion of light rays James Gregory, diffraction grating Thomas Young, two-slit diffraction, 1803 Augustin Jean Fresnel Christiaan Huygens Thomas Young's sketch of two-slit diffraction, which he presented to the Royal Society in 1803
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