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The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656...

The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nmnm (red) and 486 nmnm (blue). Light from a hydrogen lamp illuminates a diffraction grating with 500 lines per mm, and the light is observed on a screen 1.50 mm behind the grating. What is the distance between the first-order red and blue fringes? Express your answer in centimeters to three significant figures.

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