An optical engineer needs to ensure that the bright fringesfrom a double slit ar

Question

An optical engineer needs to ensure that the bright fringesfrom a double slit are 15.7 mm apart on a detector that is 1.76 mfrom the slits. If the slits are illuminated with 633 nm light, howfar apart should the slits be?                             A)76.7m             B) 71.0m              C) 82.4m                 D)65.3 m An optical engineer needs to ensure that the bright fringesfrom a double slit are 15.7 mm apart on a detector that is 1.76 mfrom the slits. If the slits are illuminated with 633 nm light, howfar apart should the slits be?                             A)76.7m             B) 71.0m              C) 82.4m                 D)65.3 m

Explanation / Answer

We know that           a = D/ y             = 633 x 10-9 * 1.76 / 15.7 x 10-3             = 70.96 m             ˜ 71.0 m

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