Two coherent light sources S1 and S2(λ=6000 mathringA) are 1 mm apart from each other. The screen is placed at a distance of 25 cm from the sources. The width of the fringes on the screen should be

Question

Two coherent light sources S1 and S2(λ=6000 mathringA) are 1 mm apart from each other. The screen is placed at a distance of 25 cm from the sources. The width of the fringes on the screen should be (A) 0.015 cm (B) 0.025 cm (C) 0.010 cm (D) 0.030 cm

Tardigrade Admin · Accepted Answer

β=(6000 × 10-10 × 25 × 10-2/10-3) =150000 × 10-9=0.15 × 10-9 =0.15 × 10-3 m =0.015 cm

Q. Two coherent light sources $S_{1}$ and $S_{2} (λ = 6000 \overset{˚}{A})$ are $1 mm$ apart from each other. The screen is placed at a distance of $25 c m$ from the sources. The width of the fringes on the screen should be

0.015 cm

0.025 cm

0.010 cm

0.030 cm

$β = \frac{6000 \times 1 0 ^{- 10} \times 25 \times 1 0 ^{- 2}}{1 0 ^{- 3}}$
$= 150000 \times 1 0^{- 9} = 0.15 \times 1 0^{- 9}$
$= 0.15 \times 1 0^{- 3} m = 0.015 c m$

Q. Two coherent light sources S1​ and S2​(λ=6000A˚) are 1mm apart from each other. The screen is placed at a distance of 25cm from the sources. The width of the fringes on the screen should be