35. 1 ssm Late one night on a highway, a car speeds by you and fades into the distance. Under these conditions the pupils of your eyes have diameters of about 7.0 mm. The taillights of this car are separated by a distance of 1.2 m and emit red light (wavelength = 660 nm in vacuum). How far away from you is this car when its taillights appear to merge into a single spot of light because of the effects of diffraction?
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- You are working with an electrical engineer who wants to send you messages with his microwave antenna. The engineer points his antenna at a narrow window (width 36.0 cm) of your building and starts sending microwaves (wavelength 5.40 cm) your way. What is the location of the first "dark" fringe on the wall 6.70 m from the window? cm Additional Materials O ReadingSome unpolarized light has an intensity of 1415 W/m2 before passing through three polarizing filters. The transmission axis of the first filter is vertical. The second filter's transmission axis is 24.0° from vertical. The third filter's transmission axis is 46.0° from vertical. What is the intensity of the light that emerges from the three filters? W/m2You are in a room lit only by cyan light. A chair in that room looks blue to you. (Your eyes see red + green light as yellow; your eyes see red+ blue light as magenta; your eyes see green and blue light as cyan) a. What colors of light is the chair reflecting in the cyan room? What colors of light is the chair absorbing in that room? Explain. b. You then move the chair into a room lit only by red light. The chair now looks red. What colors of light is the chair reflecting now? What colors of light is it absorbing now? Explain. c. What color will the chair be in the sunlight? Explain.
- 0000 О A point source emits light isotropically (i.e. with the same intensity in all directions). Let I be the luminous intensity at a distance d from the source. The intensity at a distance 2d is equal to: A. 21 B. I C. 1/4 O D. 1/2 OE. I/16Two antennas located at points A and B are broadcasting radio waves of frequency 104.0 MHz. The signals start in phase with each other. The two antennas are separated by a distance d = 8.7 m. An observer is located at point P on the x axis, a distance x = 110.0 m from antenna A. The points A, P, and B form a right triangle. What is the phase difference between the waves arriving at P from antennas A and B? Enter your answer in radiansA tempered glass is placed atop a phone screen (n=1.52). Green light (540 nm) is incident from air onto the tempered glass (1.60). What is the minimum thickness of the tempered glass for the incident light to appear constructively? 0 [nm] 632 [nm] 169 [nm] 84 [nm]
- n 18 Light is travelling from ruby to air. Its speed in ruby is 1.7 x10$ m/s. Find the critical angle of ruby-air boundary. (Use nair 1,c = 3x10% m/s) out of 1 Select one: question a. 48.6 ° b. 45.7° c. 34.5° mula Sheet Final Exam Physics, T-2, Jump to... AY 20-218. Three polarizing disks whose planes are parallel and centered on common axıs. The directions of their transmission axes relative to the vertical are respectively: 0 = 17°, 6, = 42°, and 0, 75°. A beam of light polarized along the vertical is incident onto the first polarizer with an intensity of 1o = 20 W/m2, Calculate the transmitted intensity through all three polarizers. W/m28. Three polarizing disks whose planes are parallel and centered on common axis. The directions of their transmission axes relative to the vertical are respectively: 01 = 17°, 02 = 45°, and 03 = 55°. A beam of light polarized along the vertical is incident onto the first polarizer with an intensity of Io = 14 W/m2. Calculate the transmitted intensity through all three polarizers. W/m2 of19 00 of1 9 oor19
- P.11 A beam of polarized light of intensity 10 passes through a sheet of ideal polarizing material. The polarization axis of the beam and the transmission axis of the sheet differ by 60°. What is the intensity of the emerging light? a) 0.87 b) 0.75 c) 0.50 d) 0.25A.) Polarized light is incident on 5 polarizing sheets. The axis of the first polarized sheet makes an angle with the plane of polarization. Each subsequent sheet has an axis that is rotated by an angle from that of adjacent sheets. Find if 40% of the incident intensity is transmitted by the sheets. B.) Suppose you want to rotate the plane of polarization of a beam of polarized light by 82°, but you do not want the final intensity to be less than 57% of the initial intensity. What is the minimum number of polarizing sheets you must use? Assume that each sheet is rotated the same angle relative to the adjacent sheets. sheetsA.) Polarized light is incident on 6 polarizing sheets. The axis of the first polarized sheet makes an angle 0 with the plane of polarization. Each subsequent sheet has an axis that is rotated by an angle e from that of adjacent sheets. Find e if 34% of the incident intensity is transmitted by the sheets. B.) Suppose you want to rotate the plane of polarization of a beam of polarized light by 78°, but you do not want the final intensity to be less than 53% of the initial intensity. What is the minimum number of polarizing sheets you must use? Assume that each sheet is rotated the same angle relative to the adjacent sheets. sheets