How wide must a narrow slit be if the first diffraction minimum occurs at ±12° with laser light of 633 nm? A) 3.0 × 10−⁶ m B) 3.0 × 10−⁵ m C) 6.1 × 10−⁶ m D) 6 .1× 10−⁵ m E) 1.5 × 10−⁶ m

Question

Quizplus · Accepted Answer

The correct answer is A.The first diffraction minimum occurs at an angle given by:sin θ = λ/wwhere λ is the wavelength of light, w is the width of the slit, and θ is the angle of the minimum.Solving for w, we get:w = λ/sin θSubstituting the given values, we get:w = (633 nm)/(sin 12°) = 3.0 × 10−⁶ m

How Wide Must a Narrow Slit Be If the First