ntents Grades Course ContentsHW 12 (Nov. 27) Double slits: slits distance and fr

Question

ntents Grades Course ContentsHW 12 (Nov. 27) Double slits: slits distance and fringe width O Timer Notes Evaluate Feedback-Print on a screen located x 4.60 m away Two narrow slits are illuminated by a laser with a wavelength of 585 nm. The interference pattern shows that the sec wo slits 5.98E-4 m ond-order bright fringe is located y 9.00 cm away from the central bright fringe. Calculate the distance between the First you have to calculate the angle of the maximum. Then you can use the formula for bright fringes of double slits. Submit Answer Incorrect. Tries 1/12 Previous Tries The screen is now moved 0.8 m further away. What is the new distance between the central and the second-order bright fringe? Submit Answer Tries 0/12 Post Discussion Send Feedback

Explanation / Answer

a) y = m lambda * x / d

d = m * lambda * x / y

= (2 * 585 * 10-9 * 4.60) / (0.09)

distance d = 5.98 * 10-5 m

b) x' = 4.6 + 0.8 = 5.4 m

y' = m * lambda * x' / d

= (2 * 585 * 10-9 * 5.4) / (5.98 * 10-5 )

new distance y' = 0.106 m = 10.6 cm

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