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Unformatted text preview: incidence on a cd-ROM. On a screen three feet away the diffraction spots are one foot apart. What is the spacing of the lines on the disk? a) 1.6 nm ; b) 0.293 mm ; c) 1.68 m ; d) 47 nm ; e) 7.43 m What do you know? The angle between diffraction minima in the forward direction is such that sin d . The tangent of the angle is 1/3 so . o 43 . 18 ) 3333 . arctan( So sin / d 1.682 m...
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This note was uploaded on 09/23/2010 for the course PH 02c taught by Professor Mile during the Spring '04 term at Riverside Community College.
- Spring '04