Light of wavelength 630 nm falls on two slits and produces an interference pattern in which the third-order bright red fringe is

Question

ivanzaharov [21]

2 years ago

15

Light of wavelength 630 nm falls on two slits and produces an interference pattern in which the third-order bright red fringe is

45 mm from the central fringe on a screen 3.0 m away. What is the separation of the two slits?

Physics

1 answer:

goblinko [34] · Answer 1 · 2022-08-13T02:02:38+03:00

Answer:

d $\frac{x}{l}$ = m× λ⇒ d = λ ×m×l / x

= 630× $10^{-9}$ m × 3×3m/ 45× $10^{-3}$ m

= 1.26× $10^{-4}$ m

Explanation:

the above calculation is based on Young’s double slit experiment where the two slits provide two coherent light sources which results either constructive interference or destructive interference when passing through a double slit.