9. A fiber optic cable is a long cylinder of plastic (the core) coated in cladding. The index of refraction of the core is 1.55, and the index of refraction of the cladding is 1.35. a. If the incident angle 0 in the picture is 16.0°, what is the angle of refraction in the core? b. What is the largest angle 0 at which light can hit the end of the cable and still be totally internally reflected by the cladding in the core? air e core cladding

a. A ray of light enters a fiber optic cable with index of refraction n from air at an angle e as shown below. Let the angle 0 be 69°. For total internal reflection to occur at the cable-air interface, what must be the value of n? n = nair = 1 0 θα θα n

A light ray is incident at 45° on a glass block immersed inside a liquid of refractive index nL = 1.33 as shown in the figure below. In this configuration, the refractive ray skims the bottom surface. Determine the refractive index of the glass, ng. ng 45° ng = 1.63 ng = 1.7 ng = 1.48 ng = 1.51 O ng = 1.57

w9-10 A diamond in air is illuminated with white light. On one particular facet, the angle of incidence is 25.70°. Inside the diamond, red light (λ = 660.0 nm in vacuum) is refracted at 10.88° with respect to the normal; blue light (λ = 470.0 nm in vacuum) is refracted at 10.13°.  How would a diamond look if there were no dispersion? a. The diamond would look white.   b. The diamond would look red.   c. The diamond would look blue.   d. The diamond would be clear.

Box answers.

A light ray in the core (n=1.40) of a cylindrical optical fiber is incident on the cladding. A ray is transmitted through the cladding (n= 1.20) and into the air. The emerging ray makes an angle 02 = 6.10° with the outside surface of the cladding. What angle 01 did the ray in the core make with the axis? Air

5. A narrow beam of composite red and violet light initially in air is incident upon a rectangular block. The indices of refraction regarding the block are; n=1.50 for the red light n=1.54 for the violet light. a. If the incident beam strikes the surface of the block at an angle of a = 65.0°, what it the angular separation of the red and violet light as it exits the block, going back into air? b. Between what two angles of incidence a will only one of the colors of light emerge through the top of the block? State which color makes it through (Red or Violet).

A ray of light enters a flat surface of a block of glass (n=1.52) that is surrounded by water (n=1.33). If the refractive angle is 24.4°, what would be the angle of reflection? Select one: a. 28.17° b. 15.77° c. 18.10° d. 21.19°

a. A ray of light enters a fiber optic cable with index of refraction n from air at an angle e as shown below. Let the angle 0 be 69°. For total internal reflection to occur at the cable-air interface, what must be the value of n? Dair - 1 n = Ꮎ θα ec n

4. Figure CQ22.4 shows light from material A with index of refraction nд entering materials B and C with indices of refraction NB and nc Rank the three indices of refraction from largest to smallest. a. nд, nB , nc b. nB, nc, NA c. nc, WA 9 nB d. nB NA, 2 nc e. nc, nB, NA Figure CQ22.4 NA ng 55.0° i 55.0° nc