In a Young's double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light of wavelength 589 nm is used and the interference pattern is observed on a screen kept 1.5 m away. The separation between the successive bright fringes on the screen is :

Question

In a Young's double slit experiment, the separation between the slits is 0.15 mm. In the experiment, a source of light of wavelength 589 nm is used and the interference pattern is observed on a screen kept 1.5 m away. The separation between the successive bright fringes on the screen is : (A) 4.9 mm (B) 6.9 mm (C) 5.9 mm (D) 3.9 mm

Tardigrade Admin · Accepted Answer

Finge width, β = (Dλ/d) = (1.5 ×589 × 10-9/0.15× 103) = 5.9 × 10-3 m = 5.9 mm

Q. In a Young's double slit experiment, the separation between the slits is $0.15 mm$ . In the experiment, a source of light of wavelength $589 nm$ is used and the interference pattern is observed on a screen kept $1.5 m$ away. The separation between the successive bright fringes on the screen is :

$4.9 mm$

$6.9 mm$

$5.9 mm$

$3.9 mm$

Finge width, $β = \frac{D λ}{d} = \frac{1.5 \times 589 \times 1 0 ^{- 9}}{0.15 \times 1 0 ^{3}}$
$= 5.9 \times 1 0^{- 3} m$
$= 5.9 mm$

Q. In a Young's double slit experiment, the separation between the slits is 0.15mm. In the experiment, a source of light of wavelength 589nm is used and the interference pattern is observed on a screen kept 1.5m away. The separation between the successive bright fringes on the screen is :

4.9mm

6.9mm

5.9mm

3.9mm