n a double-slit experiment, the slit separation is 100 times the wavelength of the light. What is the angular separation (in degrees) between two adjacent bright fringes? Express your answer using three significant figures. —| ΑΣΦ ?

Two slits spaced 0.0720 mm apart are 0.800 m from a screen. Coherent light of wavelength > passes through the two slits. In their interference pattern on the screen, the distance from the center of the central maximum to the first minimum is 3.00 mm. The intensity at the peak of the central maximum is 0.0300 W/m². Part A What is the intensity at point on the screen that is 2.00 mm from the center of the central maximum? Express your answer with the appropriate units. НА ? undo W I= 0.03141 m² Submit Previous Answers Request Answer x Incorrect; Try Again; 5 attempts remaining Part B What is the intensity at point on the screen that is 1.50 mm from the center of the central maximum? Express your answer with the appropriate units. ? A I = Value Units

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Question A6 It is desired to apply an anti-reflection coating on a glass lens used in air, by coating the lens with a thin film of magnesium fluoride of refractive index n = 1.37; (assume the glass has refractive index larger than nF). Write down the formula for optical path difference between waves reflected at top and bottom of the film, and use this to calculate the minimum required thickness of the coating to give a reflectance minimum for normal-incidence green light of wavelength 550 nm in air.