Two slits spaced apart are placed from a screen

PHYSICS · Subjective · A Level · Physics · Waves · Waves

Problem

Two slits spaced 0.450 mm0.450\text{ mm} apart are placed 75.0 cm75.0\text{ cm} from a screen. What is the distance between the second and third dark lines of the interference pattern when the slits are illuminated with coherent light of wavelength 500 nm500\text{ nm}?

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