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Chapter 33: Q58P (page 1005)
Question: The index of refraction of benzene is. What is the critical angle for a light ray traveling in benzene toward a flat layer of air above the benzene?
The critical angle for the light ray is .
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Question: Figure depicts a simplistic optical fiber: a plastic coreis surrounded by a plastic sheath . A light ray is incident on one end of the fiber at angle.The ray is to undergo total internal reflection at point A, where it encounters the core鈥搒heath boundary. (Thus there is no loss of light through that boundary.) What is the maximum value of that allows total internal reflection at A?
Figure:
Figure 33-31 shows the multiple reflections of a light ray along a glass corridor where the walls are either parallel or perpendicular to one another. If the angle of incidence at point a is, what are the angles of reflection of the light ray at points b, c, d, e, and f?
Question: In Fig. 33-58, light from rayArefracts from material into a thin layer of material , crosses that layer, and is then incident at the critical angle on the interface between materials 2 and 3 .(a) What is the value of incident angle ? (b) If is decreased, does part of the light refract into material 3 ? Light from ray B refracts from material 1into the thin layer, crosses that layer, and is then incident at the critical angle on the interface between materials 2 and 3. (c) What is the value of incident angle ? (d) If is decreased, does part of the light refract into material 3 ?
The intensity Iof light from an isotropic point source is determined as a function of distance r from the source. The Figure gives intensity I versus the inverse square of that square r-2. The vertical axis scale is set by Is=200 w/m2, and the horizontal axis scale is set by rs-2 = 8.0 m-2. What is the power of the source?
Figure:
Project Seafarer was an ambitious program to construct an enormous antenna, buried underground on a site about in area. Its purpose was to transmit signals to submarines while they were deeply submerged. If the effective wavelength wereEarth radii, what would be the (a) frequency and(b) period of the radiations emitted? Ordinarily, electromagnetic radiations do not penetrate very far into conductors such as seawater, and so normal signals cannot reach the submarines.
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