Concept explainers
A glass sheet is covered by a very thin opaque coating. In the middle of this sheet there is a thin scratch 0.00125 mm thick. The sheet is totally immersed beneath the surface of a liquid. Parallel rays of monochromatic coherent light with wavelength 612 nm in air strike the sheet perpendicular to its surface and pass through the scratch. A screen is placed in the liquid a distance of 30.0 cm away from the sheet and parallel to it. You observe that the first dark fringes on either side of the central bright fringe on the screen are 22.4 cm apart. What is the refractive index of the liquid?
Want to see the full answer?
Check out a sample textbook solutionChapter 36 Solutions
University Physics (14th Edition)
Additional Science Textbook Solutions
Modern Physics
Essential University Physics: Volume 2 (3rd Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
Lecture- Tutorials for Introductory Astronomy
College Physics
Sears And Zemansky's University Physics With Modern Physics
- Laser light of wavelength 460 nmnm is traveling in air and shines at normal incidence onto the flat end of a transparent plastic rod that has nn = 1.30. The end of the rod has a thin coating of a transparent material that has refractive index 1.75. a)What is the minimum (nonzero) thickness of the coating for which there is maximum transmission of the light into the rod? b)What is the minimum (nonzero) thickness of the coating for which transmission into the rod is minimized?arrow_forwardA thin layer of liquid methylene iodide (n = 1.76) is sandwiched between two flat, parallel plates of glass (n = 1.42). What is the minimum thickness of the liquid layer if normally incident light with λ= 550 nm in air is to be strongly reflected? 63.0 nm 99.2 nm 78.1 nm 126.0 nmarrow_forwardA thin layer of a transparent material that has an index of refraction of 1.25 is used as a nonreflective coating on the surface of glass that has an index of refraction of 1.50. What should the minimum thickness of the material be for the material to be nonreflecting for light that has a wavelength of 578 nm?arrow_forward
- Problem 8 :We wish to coat a flat slab of glass (n 1.5) with a %3D transparent material (n-1.25) so that light of wavelength 620nm (in vacuum) incident normally is not reflected. What should be the minimum thickness of the coating? Air=1 Film= Glass=1.5 1.25 a 111arrow_forwardA flat piece of glass is held stationary and horizontal above the highly polished, flat top end of a 10.0-cm-long vertical metal rod that has its lower end rigidly fixed. The thin film of air between the rod and glass is observed to be bright by reflected light when it is illuminated by light of wavelength 500 nm. As the temperature is slowly increased by 25.0°C, the film changes from bright to dark and back to bright 200 times. What is the coefficient of linear expansion of the metal?arrow_forwardTwo flat glass plates are separated by a distance d = 123 nm. There is a layer of oil between the plates. White light shines directly down on the glass. One ray reflects off the top surface of the top oil layer, and a second ray reflects off the bottom surface of the oil layer. The index of refraction of the glass is na = 1.49, and the index of refraction of the oil is no = 1.25. glass glass a. For each ray state whether there is a ½2 phase change, or no phase change. ONLY 1 ATTEMPT IS ALLOWED FOR EACH. Ray 1: ---Select--- Ray 2: ---Select--- b. What is the extra path length that Ray 2 must travel in the oil? nm c. What is the longest wavelength of light in a vacuum which will give constructive interference for these two reflected rays? nmarrow_forward
- A glass sheet 0.910 µm thick is suspended in air with white light incident perpendicularly on the sheet. In reflected light, there are gaps in the visible spectrum at 529.2 nm and 635.0 nm. Calculate the minimum value of the index of refraction n of the glass sheet that would produce this effect.arrow_forwardA thin layer of liquid methylene iodide (n = 1.756) is sandwiched between two flat, parallel plates of glass (n = 1.50). What must be the thickness of the liquid layer if normally incident light with = 394 nm in air is to be strongly reflectedarrow_forwardThe yellow D, line from a sodium discharge lamp has a vacuum wavelength of 589.5923 nm. Suppose such light falls at 30.00° on the surface of a film of soybean oil (n = 1.4729) suspended (within a wire frame) in air. What minimum thickness should the film have in some region if that area is to strongly reflect the light? %Darrow_forward
- A thin film of oil (no=1.50) with varying thickness floats on water (nw=1.33). When it is illuminated from above by white light, the reflected colors are as shown in the figure. In air, the wavelength of yellow light is 580nm. What is the oil's thickness t at point B?arrow_forwardThe walls of a soap bubble have about the same index of refraction as that of plain water, n = 1.33. There is air both inside and outside the bubble. What wavelength (in air) of visible light is most strongly reflected from a point on a soap bubble where its wall is 340. nm thick? Note: Your answer is assumed to be reduced to the highest power possible.arrow_forwardAn extremely thin sheet of glass is being inspected at the camera store. Illuminated by white light at near-normal incidence, the film-like sheet is 0.415 µm thick and has air on both sides. If the glass has a refractive index of 1.52, what wavelength of visible light (in nm) does it reflect most strongly? (The wavelengths of visible light range from 400 to 700 nm.)arrow_forward
- Physics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning