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| To deform the liquid mirror, the scientists heat the surface with a 4.1 mW He-Ne laser emitting at 632.8 nm and detect any change in shape using a Fizeau interferometer. For a silicon oil substrate, the laser heating produced a Gaussian shaped bump on the mirror surface with a peak amplitude of 440 nm and a FWHM of 3.6 mm. (credit: Laval University, Canada) |
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