An oil film with refractive index 1.48 and thickness 290 nm is floating on water and illuminated with white light at normal incidence. What is the wavelength of the dominant color in the reflected light?

A scientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). She aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). The index of refraction of water is 1.33.Now assume that the oil had a thickness of 200 nm and an index of refraction of 1.5. A diver swimming underneath the oil slick is looking at the same spot as the scientist with the spectromenter. What is the longest wavelength λwater of the light in water that is transmitted most easily to the diver?

A thin film of glass (n 1.52) of thickness 0.420 um is viewed under white light at near normal incidence. What wavelength of visible light is most strongly reflected by the film when sur- rounded by air?

A beam of white light goes from air into quartz at an angle of incidence of 50°.What is the angle between the red (660 nm) and blue (470 nm) parts of the refracted light?

A soap film, 4.5 x 10-7 m thick, is illuminated by white light normal to its surface. The index of refraction of the film is 1.50. What wavelength will be intensified in the reflected beam? 450 nm 540 nm   420 nm 675 nm 600 nm

An extremely thin sheet of glass is being inspected at the laboratory. Illuminated by white light at near-normal incidence, the film-like sheet is 0.361 µm thick and has air on both sides. If the glass has a refractive index of 1.66, what wavelength of visible light (in nm) does it reflect most strongly? (The wavelengths of visible light range from 400 to 700 nm.)??nm

A 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 nm

Red light having a wavelength of 690 nm (in air) is vertically incident on a thin film of oil that has an index of refraction of 1.19. The film of oil floats above water (having an index of refraction of 1.30). The red light is brightly reflected. The minimum (nonzero) thickness of the film of oil is 580 nm. 145 nm. 290 nm. 345 nm.

Light from a 604-nm monochromatic source is incident upon the surface of fused quartz (n = 1.56) at an angle of 48°. What is the angle of reflection from the surface?

A technician places a fluid substance, with a refractive index of 1.75, between two horizontal panes of flat glass (each of which has n = 1.40). He then illuminates the assembly from above with monochromatic light (? = 550 nm). What is the minimum thickness (in nm) that the liquid layer must have if the light is to be strongly reflected back toward its source?