Calculate the minimum thicknesses of the thin film (n = 1.58) that reflected no yellow light at 580 nm under normal incidence as shown in Figure A7. 2 Air n = 1.00 Film n Air A B Figure A7
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- EM WAVES HAVING A WAVELENGTH OF λ = 480nm A PASS THROUGH A SINGLE SLIT AND PRODUCE THE PATTERN SHOWN AT RIGHT ON A SCREEN 0.60m BEYOND. THE DISTANCE FROM A To B IS 0.15m. FIND THE WIDTH, W, OF THE SINGLE SLIT. T BRIGHT II T 8A thin layer of oil n =1.2 is on top of a substance with index of refraction n = 1.5. Normally incident 551nm light in air is incident on the oil and is not reflected at all. Determine the minimum nonzero thickness of the film (in nm). Check correct show all workA light with wavelength λ = 565 nm falls on a pair of closely separated slits. The first dark fringe of the interference pattern is at an angle θ = 3.25 degrees from the central maximum. a) Solve for the numerical value of d in mm.
- When polychromatic visible light shines through a diffraction grating, the colors seen closest to the central maximum will: A. be visible as the lowest wavelength in the mixture B. be visible as the highest wavelength in the mixture C. be a mixture of the wavelengths present D. Always be whiteA grating diffracts a green light at 520 nm with 3000 lines/cm. Through what angle is the light diffracted in the first order?A monochromatic light is directed onto a single slit 9.1 x 10 -3 mm wide. If the angle between the second dark fringes (minimums) and the central maximum is 8°: a) Calculate the wavelength of light. b) Determine the angular position of the third minimum.
- A thin film of oil (n = 1.26) is located on smooth, wet pavement. When viewed perpendicular to the pavement, the film reflects most strongly red light at 640 nm and reflects no yellow light at 548 nm. How thick is the oil film? nmA helium-neon laser (? = 632.8 nm) is used to calibrate a diffraction grating. If the first-order maximum occurs at 19.4°, what is the spacing between adjacent grooves in the grating? (In this problem, assume that the light is incident normally on the grating.) ?mProblem 10 In costume jewelry, rhinestones (made of glass with n -1.50) are often coated with silicon monoxide (n 2.0) to make them more reflective. How thick should the coating be to achieve strong reflection for 560 nm light incident normally? Air=n=1 Film=n= 2.0 Glass=n=1.5 115