1. When light passes from air to water (refractive index 1.33), its wavelength decreases to times its original value. (Note: enter answer as a decimal)
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- What happens to a light wave when it hits a surface that has a higher index of refraction? a) It reflects with λ/2 phase shift. b) It reflects with a λ/4 phase shift. c) It's shift is porportional to the angle of reflection. d) It reflects with it's phase unshifted.A light ray in air has an incident angle of 53.8゚ when it strikes the boundary of an unknown material. If the reflected ray is completely polarized so that the incident angle is the Brewster's angle what is the index of refraction of the unknown material? A. 1.25 B. .807 C. 1.69 D. .591 E. 1.3714. The figure shows a ray of light that passes from the white material A (with index of refraction nA = 1.1) into the grey material B. (a) In which material does the light travel faster? A) Material A B) Material B (b) What is the index of refraction of material B? 30° 60° A 70° B 20°
- 10. A beam of light polarized along the y axis and moving along the +z axis passes through two polarizing sheets with axes of polarization oriented 30° and 70° measured clockwise from the positive direction of the y axis. The final intensity of the beam is found to be 61 W/m². What is the initial beam intensity? (1) 280 W/m² (2) 700 W/m² (3) 200 W/m² (4) 50 W/m² .2 (5) 140 W/m² 11. Light of wavelength 520 nm is incident perpendicularly on a diffraction grating having 200 lines/mm. What is the highestWhat is the refractive index of the material in which the speed of light is 1.28×108 m/s. (c = 3.0 × 108 m/s) O 1.12 O 1.20 1.80 1.65 O 2.341. Starting from its electric field componenets: E = E#0 Cos(wt + yx); Ey = Eyo cos(wt + Yy) derive the following general expression for polarization of light: %3D E E E, Ey cos 8 = sin? S Ex0 Eyo where 8 = 8, - 8p.
- The index of refraction for water is about 4/3. What happens to light when it travels from air to water? Its speed decreases to 3c/4, and its wavelength decreases by a factor of 3/4 Its speed decreases to 3c/4 and its wavelength increases by a factor of 4/3. Its speed increases to 4c/3, and its frequency decreases by a factor of 3/4. Its speed decreases to 3c/4, and its frequency increases b 4/3.[Q7] Which one of the following sentences is an accurate statement about light? a. CO d. C. b. When light strikes a surface at Brewster's angle, it is completely reflected at the surface. When light strikes a surface at Brewster's angle, only the reflected light is 100% polarized. e f. When light strikes a surface at Brewster's angle, the reflected and transmitted light are 100% polarized. When light strikes a surface at the critical angle, only the reflected light is 100% polarized. When light strikes a surface at the critical angle, all the light passes through the surface None of these statements are accurate. armast cec