Two straight narrow parallel slits 3 mm apart are illuminated with monochromatic light of wavelength 5900 × 10-8 cm . Fringes are observed at a distance of 3 cm from the slits. Find the width of fringes.

Question

Two straight narrow parallel slits 3 mm apart are illuminated with monochromatic light of wavelength 5900 × 10-8 cm . Fringes are observed at a distance of 3 cm from the slits. Find the width of fringes. (A) 0.51 mm (B) 0.52 mm (C) 5.9 μ m (D) 0.59 m

Tardigrade Admin · Accepted Answer

we know, β=(λ D / d ) =(5900 × 10-10 × 3 × 10-2/3 × 10-3) β=5.9 × 10-6 m β=5.9 μ m

Q. Two straight narrow parallel slits $3 mm$ apart are illuminated with monochromatic light of wavelength $5900 \times 1 0^{- 8} c m .$ Fringes are observed at a distance of $3 c m$ from the slits. Find the width of fringes.

$0.51 mm$

$0.52 mm$

$5.9 μ m$

$0.59 m$

we know, $β = \frac{λ D}{d}$
$= \frac{5900 \times 1 0 ^{- 10} \times 3 \times 1 0 ^{- 2}}{3 \times 1 0 ^{- 3}}$
$β = 5.9 \times 1 0^{- 6} m$
$β = 5.9 μ m$

Q. Two straight narrow parallel slits 3mm apart are illuminated with monochromatic light of wavelength 5900×10−8cm. Fringes are observed at a distance of 3cm from the slits. Find the width of fringes.

0.51mm

0.52mm

5.9μm

0.59m