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- If you have completely polarized light of intensity 150 W/m2 , what will its intensity be after passing through a polarizing filter with its axis at an 89.0 angle to the light’s polarization direction?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?To save money on making military aircraft invisible to radar, an inventor decides to coat them with a nonreflective material having an index of refraction of 1.20, which is between that of air and the surface of the plane. This, he reasons, should be much cheaper than designing Stealth bombers. (a) What thickness should the coating be to inhibit the reflection of 4.00-cm wavelength radar? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?
- The movable mirror of a Michelson interferometer is attached to one end of a thin metal rod of length 23.3 mm. The other end of the rod is anchored so it does not move. As the temperature of the rod changes from 15°C to 25 C , a change of 14 fringes is observed. The light source is a He Ne laser, =632.8 nm . What is the change in length of the metal bar, and what is its thermal expansion coefficient?Astronomers observe the chromosphere of the Sun with a filter that passes the red hydrogen spectral line of wavelength 656.3 nm, called the H line. The filter consists of a transparent dielectric of thickness d held between two partially aluminized glass plates. The filter is held at a constant temperature. (a) Find the minimum value of d that produces maximum transmission of perpendicular H light if the dielectric has an index of refraction of 1.378. (b) What If? If the temperature of the filter increases above the normal value, increasing its thickness, what happens to the transmitted wavelength? (c) The dielectric will also pass what near-visible wavelength? One of the glass plates is colored red to absorb this light.Components of some computers communicate with each other through optical fibers having an index of refraction n = 1.55. What time in nanoseconds is required for a signal to travel 0.200 m through such a fiber?
- Light of wavelength A = 629 nm is incident from vacuum onto glass of index of refraction n= 1.49 with an angle of incidence 0 = 30°. Taking the speed of light in vacuum equal to 3 x 10^8 m/s, then the waveleng th, Ag, and the frequency, fg, of light in the glass are respectively: O 422.1 nm; 4.8x10^14HZ O 408.4 nm; 4.8x10^14 Hz O 422.1 nm, 7.1x10*14 Hz O 433.8 nm, 4.8x10 14 Hz O 433.8 nm, 6.9x10 14HZ aonherical mirror is located at a distance gl = 6 cm. The %3D1. (a) The speed of a 500 nm light is 3 .00x10^8 m/s in vacuum and 1.95x10^8 m/s in a certain glass. What is theindex of refraction of the light? (b) What is the frequency of the 500 nm light in a vacuum? (c) What is the frequency of the 500 nm light in the glass? (d)If the 500 nm light is incident on a flat boundary between the glass part in Ia and air (nair= 1.00) asshown, what is the angle of reflection? Sketch on the given diagram. Do the samework for the refracted ray.A ray of light travelling in glass having a refractive index nlass= 1.5, is incident at an angle 0 on the glass-air interface. If a thin layer of liquid (niquid = 1.23) is poured on the glass air interface, then at what angle would the ray emerge from the liquid-air interface? air (nair) air (nair) liquid (niquid) glass (ng) glass (ng) O 48.3° 90.0° 35.7° O 45.6° O 82.5°
- Light with a frequency of 5.80 * 10^14 Hz travels in a block of glass that has an index of refraction of 1.52. What is the wavelength of the light (a) in vacuum and (b) in the glass?Light with a frequency of 5.80 x 1014 Hz travels in a block of glass that has an index of refraction of 1.52. What is the wavelength of the light (a) in vacuum and (b) in the glass?Light with a frequency of 5.80 x 1014 Hz travels in a glass block with an index of refraction of 1.52. What is the wavelength of light? (a) in vacuum and (b) in the glass?