1). A Young\'s interference experiment is conducted with blue-green argon laser

Question

1). A Young's interference experiment is conducted with blue-green argon laser light (?=515nm). The separation between the slits is 0.50 mm, and the interference pattern appears on a screen 3.3 m away. What is the spacing between the bright fringes? (1nm= 10^-9m)
2). A Young's interference experiment is performed with monochromatic green light (y=470nm). The separation between the slits is 0.120 mm, and the interference pattern on a screen shows the first side maximum 3.5 mm from the center of the pattern. How far away from the slits is the screen?



1). A Young's interference experiment is conducted with blue-green argon laser light (?=515nm). The separation between the slits is 0.50 mm, and the interference pattern appears on a screen 3.3 m away. What is the spacing between the bright fringes? (1nm= 10^-9m)
2). A Young's interference experiment is performed with monochromatic green light (y=470nm). The separation between the slits is 0.120 mm, and the interference pattern on a screen shows the first side maximum 3.5 mm from the center of the pattern. How far away from the slits is the screen?




2). A Young's interference experiment is performed with monochromatic green light (y=470nm). The separation between the slits is 0.120 mm, and the interference pattern on a screen shows the first side maximum 3.5 mm from the center of the pattern. How far away from the slits is the screen?

Explanation / Answer

Part 1)

Apply y/L = m(wavelength)/d

y/3.3 = 1(515 X 10-9)/(5 X 10-4)

y = .0034 m (3.4 mm)

Part 2)

Apply y/L = m(wavelength)/d

(.0035)/L = 1(470 X 10-9)/(1.2 X 10-4)

L = .894 m (89.4 cm)

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