3. Nearsighted people can undergo a medical procedure called keratotomy to produce normal (or at least more-normal) vision. In this procedure the shape of the cornea (and thus its refractive power) is changed, usually by the removal of tissue by the action of an excimer laser. If a nearsighted person has a far point 50 cm from the eye, by how much and in what direction (i. e., increase or decrease) must the refractive power of the cornea be changed in order to restore normal vision (i. e. far point at least 6 m from the eye)?
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Afigure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 20.9 12000 200 3.33
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This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.
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3. Nearsighted people can undergo a medical procedure called keratotomy to produce normal (or at lea...
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