Lloyd's Mirror

Lloyd's mirror is a classic optics experiment and was first described in 1834 and again in 1837 by Humphrey Lloyd in the proceedings of the Royal Irish Academy of Science. In the experiment, light from a monochromatic slit source reflects from a glass surface at a small angle and appears to come from a virtual source as a result. The reflected light interferes with the direct light from the source, forming interference fringes.

Read more about Lloyd's Mirror:  Setup, Underwater Acoustics

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