Physics · 2020
JEE Main · 2 September 2020, Shift 1 · Q17
Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source (λ=632.8 nm ). The distance between the…
Interference fringes are observed on a screen by illuminating two thin slits $\displaystyle 1$ mm apart with a light source $\displaystyle (\lambda=632.8 \mathrm{~nm})$. The distance between the screen and the slits is $\displaystyle 100$ cm. If a bright fringe is observed on a screen at a distance of $\displaystyle 1.27$ mm from the central bright fringe, then the path difference between the waves, which are reaching this point from the slits is close to :
Official answer
(1)
$\displaystyle 1.27 \mu \mathrm{~m}$
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