Question: Part A A person's vision may be improved significantly by Q having the cornea reshaped with a laser beam, in a procedure known as photorefractive

Part A A person's vision may be improved significantly by Q having the cornea reshaped with a laser beam, in a procedure known as photorefractive keratectomy. What is the difference in energy between the two levels that participate in stimulated emission in The excimer laser used in these treatments the excimer laser? produces ultraviolet light with a wavelength of 216 Express your answer to three significant figures. Arm nm. AE= 5.74 eV Previous Answers All attempts used; correct answer displayed Part B How many photons from this laser are required to deliver an energy of 1.18x10 to the cornea? Express your answer to three significant figures. AEQ photons n = 150026 Submit Previous Answers Request Answer " Incorrect; Try Again; 2 attempts remaining

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