A soap film (n=1.33) is 370 nm thick and coats a flat piece of glass (n = 1.52). Thus, air is on one side of the film and glass is on the other side, as the figure illustrates. Sunlight, whose wavelengths (in vacuum) extend from 380 to 750 nm, travels through air and strikes the film nearly perpendicularly. For what wavelength in the range of 380 to 750 nm does constructive interference cause the film to look bright in reflected light? "air=1.00 "soap = 1.33 "glass 1.52 Incident light 2
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- A beam of 580-nm light passes through two closely spaced glass plates at close to normal incidence as shown in Figure P27.23. For what minimum nonzero value of the plate separation d is the transmitted light bright?A thin film of a liquid floats on ( therefore it is less dense) on a surface of water with n= 1.33. A maximum reflection occurs at a wavelength in air of 410.0 nm. You are able to determine the thickness of the film to be 97.0 nm. What is the index of refraction of the unknown liquid? Consider n to be 1.00 for air.What visible wave length will be reflected in this scenario: A 700 nm thick soap film floats on a plate. From the air, white light is struck onto the film at a normal incidence. the wavelength of visible light to air is 400 nm to 700 nm. The index of the soap film is 1.74 and 1.58 for the plate.
- Thin Film Light is incident perpendicularly on a soap film suspended in air. The soap has an index of refraction n2 greater than that of air (n1 = 1.00). The phase shift for reflection at the air to soap interface is O T radians T radians 2 The phase shift for reflection at the air to soap interface is O I radians T radians 3 Given n2 = 1.32, what is the second least thickness of the soap film for which light of wavelength 556 nm has reflected light that undergoes fully constructive interference? (Express answer in nm to zero decimal places.) Type your answer...Two identical horizontal sheets of glass have a thin film of air of thickness t between them. The glass has refractive index 1.40. The thickness t of the air layer can be varied. Light with wavelength l in air is at normal incidence onto the top of the air film. There is constructive interference between the light reflected at the top and bottom surfaces of the air film when its thickness is 650 nm. For the same wavelength of light the next larger thickness for which there is constructive interference is 910 nm. (a) What is the wavelength l of the light when it is traveling in air? (b) What is the smallest thickness t of the air film for which there is constructive interference for this wavelength of light?A thin layer of oil with index of refraction no = 1.47 is floating above the water. The index of refraction of water is nw = 1.3. The index of refraction of air is na = 1. A light with wavelength λ = 325 nm goes in from the air to oil and water. a) Express the wavelength of the light in the oil, λ0, in terms of λ and n0. b) Express the minimum thickness of the film that will result in destructive interference, tmin, in terms of λ0. c) Express tmin in terms of λ and n0. d) Solve for the numerical value of tmin in nm.
- A soap film (n = 1.33) is 375 nm thick and coats a flat piece of glass (n = 1.52). Thus, air is on one side of the film and glass is on the other side, as the figure illustrates. Sunlight, whose wavelengths (in vacuum) extend from 380 to 750 nm, travels through air and strikes the film nearly perpendicularly. For what wavelength in the range of 380 to 750 nm does constructive interference cause the film to look bright in reflected light? nair = 1.00 nsoap = 1.33 Incident light nglass = 1.52 Number i 2 UnitsA glass surface is coated by an oil film of uniform thickness 1.00 x 10-4 cm. The index of refraction of the oil is 1.25 and that of the glass is 1.50. Some of the wavelengths in visible region (400 nm 490 nm) are completely transmitted by the oil film under normal incidence. n x 10 One of the wavelength transmitted completely in visible region is m. Find the value 11 of n.A thin layer of liquid methylene iodide (n = 1.756) is sandwiched between two flat, parallel plates of glass (n = 1.50). What is the minimum thickness of the liquid layer if normally incident light with λ = 6.00 × 102 nm in air is to be strongly reflected?
- A thin film of oil (n = 1.25) is located on smooth wet pavement, creating a system composed of the following basic layers: air, oil (the thin film), and water. When viewed from a direction perpendicular to the pavement, the film reflects red light of 640nm and reflects no green light of 512nm. (a) What are the possible film thicknesses that allow the read light to be reflected? (b) What are the possible film thicknesses if the green light is not reflected? (c) What is the minimum thickness of the oil film if both conditions are satisfied? Hint: compute at least 4 thicknesses in parts (a) and (b)A thin layer of oil with index of refraction no = 1.47 is floating above the water. The index of refraction of water is nw = 1.3. The index of refraction of air is na = 1. A light with wavelength λ = 325 nm goes in from the air to oil and water. Part (a) Express the wavelength of the light in the oil, λo, in terms of λ and no. Part (b) Express the minimum thickness of the film that will result in destructive interference, tmin, in terms of λo. Part (c) Express tmin in terms of λ and no. Part (d) Solve for the numerical value of tmin in nm.A broad beam of light of wavelength 527 nm is sent directly downward through the glass plate (n = 1.46) in Figure (a). That plate and a plastic plate (n = 1.17) form a thin wedge of air that acts as a thin film. An observer looking down through the top plate sees the fringe pattern shown in Figure (b), with dark fringes centered on the ends. (a) What is the thickness (in m) of wedge at the right end? (b) How many dark fringes will the observer see if the air between the plates is replaced with a liquid with n = 1.26? Incident light (a) Number (b) Number i Units Units (a) (b)