Adv Physics WS Name ______
Young’s Double Slits Date ______Per ______
Show Work . Circle Ans. d sin q = m l
1) Laser light shines through 2 very thin slits spaced 0.018 mm apart. Calculate the wavelength of the light if the third order bright fringe is at 6.8°.
2) 589 nm light shines through two slits that make a pattern with the second order fringe at 23.8° to the central maximum. What is the spacing of the slits?
3) What is the wavelength of the light if a laser beam creates a double slit pattern with the fringes 8.7 cm apart on a screen 2.94m away? The slits are 0.018 mm center to center.
4) Given that the light is 678 nm, the slits are spaced 5.4 E -2 mm, and the screen is 4.0 m away, what is the spacing of the dark fringes?
5) 440 nm light produces a pattern when light passes through 2 slits. In this pattern a fifth order fringe is found
at 4.5 cm from the center maximum on a screen 1.00 m away. What is the center to center spacing of the slits?
6) 450 nm light is beamed into a water filled aquarium where two slits are 3.4 E -2 mm apart. If the screen, also in the aquarium, is 50.0 cm away, how far apart are the fringes?
7) White light is used with a double slit slide with slit spacing of 0.0043 mm. Calculate the angle between the fourth order fringes of 565 nm and 562 nm light. The screen is 3.20 m away.
8) A very thin piece of glass can be placed in front of one slit only so that the laser light entering that slit is exactly half a wave behind the wave through the other slit. How does this change the pattern of fringes?