Given λ1=12000A˚ and λ2=10000A˚, D=2 cm and d=2 mm=2×10−3 cm. We have λ2λ1=h1h2 =1000012000=56 as x=du1λ1D=2×10−35×12000×10−10×2 =5×1.2×104×10−10×103=6 mm
In Young's double slit experiment, the slits are 2 ~mm apart and are illuminated by photons of two wavelengths λ_1=12000 Å and λ_2=10000 Å. At what…
NEET UG 2013 — Physics Optics
2013mcqmedium
In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1=12000A˚ and λ2=10000A˚. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other?
Official previous-year question
Held on 30 Apr 2013 · Verified 9 Jul 2026.
Options
- A
8 mm
- B
6 mm
- C
4 mm
- D
3 mm
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