In a biprism experiment, the slit is illuminated with light of wavelength \( 4800 \AA \). The di... VIDEO
In a biprism experiment, the slit is illuminated with light of wavelength \( 4800 \AA \). The distance between the slit and biprism is \( 20 \mathrm{~cm} \) and that between biprism and eyepiece is \( 80 \mathrm{~cm} \). If two virtual sources are \( 0.3 \mathrm{~cm} \) apart, determine the distance between the \( 5^{\text {th }} \) bright band on one side of the central bright band and the \( 4^{\text {th }} \) dark band on the other side.
(a) \( 13.6 \mathrm{~mm} \)
(b) \( 1.36 \mathrm{~mm} \)
(c) \( 1.2 \mathrm{~mm} \)
(d) \( 14.4 \mathrm{~mm} \)
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