Question

Problem 17.7-Enhanced - with Feedback l ReviewI Constants I Periodic Table v PartA Two narrow slits 60 μm apart are illuminated with light of wavelength 540nm. The light shines on a screen 1.2 m distant. What is the angle of the m-2 bright fringe? Express your answer in radians. rad Submit Request Answer Part B How far is this fringe from the center of the pattem? Express your answer with the appropriate units. IA Value Units Submit Request Answer Provide Feedback

Answer 1

Given Two narrow slits 60 mu m Wave length 540 mm Screen distant 1.2 m Part A To find angle of m: 2 bright fringe Angle = 2 lambda/d = 2 times 540 times 10^-9/60 times 10^-6 = 0.018 d sin theta = m lambda theta = sin^-1 (m lambda/d) = sin^-1 (0.018) theta = 1.03 degree Therefore Angle of bright fringe theta = 1.03 degree Therefore Angle to M: 2 bright fringe is 0.0018 rad Part B To find how is this fringe from of pattern. y = n D lambda/d = 2 times 1.2 times 540 times 10^-9/60 times 10^-6 = 0.0216 m = 21 mm Therefore Distance from fringe from center is y = 21 mm