1. (a) Describe 2 conditions for interference. (5 marks) (b) A soap film has an index of refraction n = 1.33. Light of w

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1 A Describe 2 Conditions For Interference 5 Marks B A Soap Film Has An Index Of Refraction N 1 33 Light Of W 1 (39.83 KiB) Viewed 42 times

1. (a) Describe 2 conditions for interference. (5 marks) (b) A soap film has an index of refraction n = 1.33. Light of wavelength = 500 nm is incident normally on the film. Calculate i smallest thickness of the film that will give a maximum interference in the reflected light. ii. maximum interference if doubling the thickness of the film calculated in part į. (3 marks) (c) A light source emits visible light of two wavelengths (A=430 nm and A' = 510 nm). The source is used in a double-slit interference experiment in which L = 1.50 m and d = 0.025 mm. Find the separation distance between the third-order bright fringes. (2.5 marks)