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homework 13 – BAUTISTA, ALDO – Due: Apr 23 2007, 4:00 am 9 2 π or 360 ◦ φ δ λ = 458 nm 0 1 0 π/ 2 π 3 π/ 2 2 π φ Question 19part 2 of 310 pointsCalculate the phase difference between thetwo wavefronts wheny= 7.8 mm. = 2 (3 . 1415926) (0 . 0772 mm) (7 . 8 mm) (458 nm) (1 . 58 m) × (0 . 001 m / mm) (1 × 10 − 9 m / nm) = 5 . 2284 rad . Question 20 part 3 of 3 10 points What is the value ofθfor which the phasedifference is 0.524 rad? Question 21part 1 of 110 pointsPlane sound waves of wavelength 0.13 mare incident on two narrow slits in a box withnonreflecting walls, as shown in the figurebelow. 5 m What is the distance between the two slits?