In Young's double slit experiment the separation d between the slits is 2 mm, the…
Physics · NEET · NTA Exams — Optics
In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 \(\text { A }\) and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20°. To increase the fringe angular width to 0.21° (with same λ and D) the separation between the slits needs to be changed to
- 2.1 mm
- 1.7 mm
- 1.9 mm
- 1. 8 mm
Answer
(C) 1.9 mm
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