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The si unit for illuminance is the lux which is a

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Unformatted text preview: the mirror, the reference beam is reunited with the object beam on the film. Because one beam interacted with the object and the other didn’t, the two beams will be out of phase and interfere with one another. This interference pattern is imprinted upon the holographic film plate, creating the holographic image. This pattern records the intensity distribution of the reflected light just as an ordinary camera does. However, it also records the phase distribution. This means that it contains information about where the waves are in their oscillating cycles as they strike the film. To determine this the object beam must be compared with the reference beam. This is accomplished via the interference. Also unlike an ordinary photo, a hologram contains all its information in every piece of it. When viewed in coherent light the object appears in 3-D and viewing a hologram from different angles will reveal the object from different angles. Luminous Flux & Illuminance Luminous flux, Φ, is the rate at which an object emits visible light (adjusted to the responsiveness of the human eye, which is most sensitive to ye...
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