COMEDK · Physics · 26. Wave Optics
In a Young's double slit experiment, the separation between the two slits is \(0.9 \mathrm{~mm}\) and the fringes are observed \(1 \mathrm{~m}\) away. If it produces the second dark fringe at a distance of \(1 \mathrm{~mm}\) from the central fringe, the wavelength of the monochromatic source of light used is
- A \(500 \mathrm{~nm}\)
- B \(600 \mathrm{~nm}\)
- C \(450 \mathrm{~nm}\)
- D \(400 \mathrm{~nm}\)
Answer & Solution
Correct Answer
(B) \(600 \mathrm{~nm}\)
Step-by-step Solution
Detailed explanation
Given, separation between two slits, \[ d=0.9 \mathrm{~mm}=0.9 \times 10^{-3} \mathrm{~m} \] Distance between slits and screen, \(D=1 \mathrm{~m}\) The distance between two consecutive dark or bright fringes is given as \(\beta\) (fringe width) and that between central tringe…
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