**Part A:**

$\overline{){\mathbf{s}}{\mathbf{i}}{\mathbf{n}}{\mathbf{\theta}}{\mathbf{=}}\frac{\mathbf{m}\mathbf{\lambda}}{\mathbf{d}}}$

For the first dark ring, the m value is, m = 1.22

Diameter of the pinhole, d = 0.1 × 10^{-3}m, wavelength, λ = 632.8 × 10^{-9} m

Part A: At what angle θ_{1} to the normal would the first dark ring be observed?

Part B: Suppose that the light from the pinhole projects onto a screen 3 meters away. What is the radius of the first dark ring on that screen? Notice that the angle from Part A is small enough that sinθ≈tanθ .

Part C: The first dark ring forms the boundary for the bright Airy disk at the center of the diffraction pattern. What is the area A of the Airy disk on the screen from Part B? answer must be in mm^{2}

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