Two very narrow slits are spaced apart and are placed from a screen

PHYSICS · Subjective · CBSE · Physics · Wave Optics · Wave Optics

Problem

Two very narrow slits are spaced 1.80 μm1.80\,\mu\text{m} apart and are placed 35.0 cm35.0\,\text{cm} from a screen. What is the distance between the first and second dark lines of the interference pattern when the slits are illuminated with coherent light of wavelength λ=550 nm\lambda=550\,\text{nm}?

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