COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 23, Problem 38QAP
To determine
The angle of refraction of the light in water.
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The condition for total polarization, at Brewster's angle, for a reflected beam from the interface between two media is that the reflected beam and the refracted beam are perpendicular to each other (see Figure 23.22). Use this information to determine a formula for Brewster's angle for an interface between vacuum and medium of index of refraction n.
Physics
Many nocturnal animals demonstrate the phenomenon of eyeshine, in which their eyes glow various colors at night when illuminated by a flashlight or the headlights of a car (see the photo). Their eyes react this way because of a thin layer of reflective tissue called the tapetum lucidum that is located directly behind the retina. This tissue reflects the light back through the retina, which increases the available light that can activate photoreceptors, and thus improve the animal’s vision in low-light conditions. If we assume the tapetum lucidum acts like a concave spherical mirror with a radius of curvature of 0.750 cm, how far in front of the tapetum lucidum would an image form of an object located 30.0 cm away? Neglect the effects of the other structures of the eye, such as the cornea and lens.
Does the refractive index of a certain material depend on the color of light incident on it? Explain.
Chapter 23 Solutions
COLLEGE PHYSICS
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- Verify that the critical angle for light going from water to air is 48.6°, as discussed at the end of Example 25.4, regarding the critical angle for light traveling in a polystyrene (a type of plastic) pipe surrounded by air.arrow_forwardIf b is Brewster's angle for light reflected from the top of an interface between two substances, and b is Brewster's angle for light reflected from below, prove that b+b=90.0.arrow_forwardA ring with a colorless gemstone is dropped into water.The gemstone becomes invisible when submerged. Can it be a diamond? Explain.arrow_forward
- Can a light ray traveling in air be totally reflected when itstrikes a smooth water surface if the incident angle is chosencorrectly? Explain.arrow_forwardIn the H. G. Wellsnovel The Invisible Man, a personbecomes invisible by altering hisindex of refraction to match thatof air. This is the idea behind thedisappearing eyedropper in Conceptual Question 10. If the invisibleman could actually do this, wouldhe be able to see? Explainarrow_forwardFigure 25.49 shows a light bulb between two mirrors. One minor produces a beam at light with parallel lays; the other keeps light from escaping without being put into the beam. Where is the filament of the light in relation to the focal point or radius of curvature of each mirror? Figure 25.49 The two mirrors trap most of the bulb’s light and form a directional beam as in a headlight.arrow_forward
- Figure 25.54 shows a ray of light passing from one medium into a second and then a third. Show that 3 is the same as it would be if the second medium were not present (provided total internal reflection does not occur). Figure 25.54 A ray of light passes from one medium to a third by traveling through a second. The final direction is the same as if the second medium were not present, but the ray is displaced by x (Shawn exaggerated).arrow_forwardWhy is the index of refraction always greater than or equal to 1?arrow_forwardFind the minimum thickness of a soap bubble that appears red when illuminated by white light perpendicular to its surface. Take the wavelength to be 680 nm, and assume the same index of refraction as water.arrow_forward
- No light passes through two perfect polarizing filters with perpendicular axes. However, if a third polarizing filter is placed between the original two, some light can pass. Why is this? Under what circumstances does most of the light pass?arrow_forwardShow that if you have three polarizing filters, with the second at an angle of 45° to the first and the third at an angle of 90.0° to the first, the intensity of light passed by the first will be reduced to 25.0% of its value. (This is in contrast to having only the first and third, which reduces the intensity to zero, so that placing the second between them increases the intensity of the transmitted light.)arrow_forwardA ray of light passed from air to a medium making an angle of incidence60 0 and angle of refraction 45 0 . 3(i) State if the refractive medium is denser or lighter than air.(iii) Also, explain- why does light bend after refraction in the refractive medium?arrow_forward
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