ACT Science Practice Question #1549 (Medium (30)) | Test Citadel
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ACT Science Difficulty: Medium (30)

Digital ACT Science Practice Question #1549

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A monochromatic green laser (532 nm) illuminated two slits separated by distance d: - Slit separation d = 0.25 mm: Fringe spacing delta y = 4.2 mm - Slit separation d = 0.50 mm: Fringe spacing delta y = 2.1 mm - Slit separation d = 1.00 mm: Fringe spacing delta y = 1.05 mm Doubling the slit separation distance d causes the interference fringe spacing to:
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d doubles -> fringe spacing halves (4.2 to 2.1 mm).

Masterclass Solution & Distractor Trap Analysis

Delta y = lambda * L / d. Fringe spacing is inversely proportional to slit separation. Doubling d halves delta y (4.2 mm -> 2.1 mm)....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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