An oil film (refractive index 1.47, thickness 0.12 µm) rests on a pool of water. If light strikes the film at an angle of 60o, what is the wavelength reflected in the second order maximum?
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An oil film (refractive index 1.47, thickness 0.12 µm) rests on a pool of water. If light strikes the film at an angle of 60o, what is the wavelength reflected in the second order maximum?
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- An extremely thin sheet of glass is being inspected at the factory. Illuminated by white light at near-normal incidence, the film-like sheet is 0.429 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.)Light is incident from air onto glass of refractive index nG=1.65 ; calculate the Brewster angle, at which the reflectance for TM polarisation is zero. Give your answer in degrees, to the nearest 0.1 degree.White light passes through a 15.0-cm-thick, silicate flint, glass slab with opposite, smooth, parallel surfaces as shown in the diagram below. The angle of incidence of the white light at the top surface is 38.0○ For this type of glass, the index of refraction of red light at 700 nm is 1.625, and the index of refraction for violet light at 400 nm is 1.660. Find the width of the spectrum of light along the surface at the bottom of the slab.
- Problem 1: You want to test a special watertight monochromatic light source in an un- derwater environment. If the light source shines its beam of electromagnetic radiation into your eyes when you and the light source are above the water, with both your eyes and the light source immersed in air, the beam appears to your eyes to have a deep violet color. The index of refraction of water is about 1.33 What color, if any, would your eyes perceive the beam to have when you and the light source are submerged in water – and why? (A) No color. The beam would become invisible under water because its wavelength in water is shorter than in air, corresponding to a wavelength of ultra-violet light. The beam's wavelength in the water determines its visibility to the eye under water, and ultra-violet light is not visible to the human eye. (B) Same color as in air, above the water, i.e., deep violet. Under water, the beam would have the same wavelength as in air. The beam's wavelength in the water…Ch. 34A very narrow beam of light containing red (660 nm) and blue (470 nm) wavelengths travels from air through a 0.68 m thick flat block of crown glass and back to air again. The beam strikes at a 30.0º incident angle. By what distance (in mm) perpendicular to their direction of travel are the red and blue beams separated when they emerge? The index of refraction for λ = 660 nm is 1.512 and the index of refraction for λ = 470 nm is 1.524. Enter a number with 3 digits behind the decimal point.