Consider a plane inclined at an angle 45∘ with the horizontal has two slits S1andS2 separated by a distance d=√2 mm. The screen is placed at a distance of D=10 m from the midpoint of the slits, as shown in the figure. A parallel monochromatic light beam of wavelength 5000 ˙A is incident on the slits as shown. If the fringe width of interference pattern on the screen is k×10−3 m, then the value of k is .

Consider a plane inclined at an angle 45∘ with the horizontal has tw

1.	Consider a plane inclined at an angle 45∘ with the horizontal has two slits S1andS2 separated by a distance d=√2 mm. The screen is placed at a distance of D=10 m from the midpoint of the slits, as shown in the figure. A parallel monochromatic light beam of wavelength 5000 ˙A is incident on the slits as shown. If the fringe width of interference pattern on the screen is k×10−3 m, then the value of k is .
Answer» Consider a plane inclined at an angle $45^{\circ}$ with the horizontal has two slits $S_{1} a n d S_{2}$ separated by a distance $d = \sqrt{2} mm$ . The screen is placed at a distance of $D = 10 m$ from the midpoint of the slits, as shown in the figure. A parallel monochromatic light beam of wavelength $5000 ˙ A$ is incident on the slits as shown. If the fringe width of interference pattern on the screen is $k \times 10^{- 3} m$ , then the value of $k$ is .