Before a sky diver opens her parachute, she may be falling at a velocity higher than the terminal velocity that she will have after the parachute opens. (4.2) a. Describe what happens to her velocity as she opens the parachute. b. Describe the sky divers velocity from when her parachute has been open for a time until she is about to land

Day 20 2/22/2016 Phys 5b Intensity at random point on screen I(y) or I(θ ) Δθ 2π A = | 2acos( 2 ) | Δϕ = hΔr = λ Δ r Δr = dsinθ 1 2π 2 2 A = | 2acos [ 2 λ d sinθ] I ~ AI o= Ca 2 2 2πd I(θ) = CA = 4Ca cos [λ sinθ] 2πd πd I(θ) = 4Ioos [ λ sinθ ]α = λ sinθ 2 Double Slit Pattern: I(α) = 4Ioos α 2 πd NSlits: I(θ ) = I(r) = sin [πdsinθ] α = πd sinθ o sin λ sinθ] λ sin [Nα] I(θ ) = or) = sin α Max: dsinθ = nλ → n = 0, 1, 2, 3,...