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But it was the devastating effect of methyl bromide on the ozone layer that led 166 nations to sign the Montreal Protocol in 1987 , one of the most important environmental victories in history . Airy Pattern Formation - When an image is formed in the focused image plane of an optical microscope , every point in the specimen is represented by an Airy diffraction pattern having a finite spread . They would take advantage of the fact that they know the true quality of the car , but the buyer does not . Whether you're on the Net or not , your profitability is still determined by the structure of your industry . The image produced by an objective lens is conjugate with the specimen , meaning that each image point at the intermediate plane is geometrically related to a corresponding point in the specimen . No doubt , these products will remain a core part of its business strategy .