21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 6, Problem 9QP
To determine
The part of eye which receives light.
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As people age, the length of their eyeballs may decrease slightly. If there is no change in the lens or the cornea, a person who always had good vision then hasA. PresbyopiaB. HyperopiaC. Myopia
The instrument that can record the image of a faint object in the least amount of observing time is the
a.
human eye.
b.
photographic plate.
c.
photometer.
d.
charge-coupled device (CCD).
e.
spectrometer.
When viewing an object closer than 20 feet, all of the following processes occur except
a. the eyes accommodate to focus on the close-up object.
b. the ciliary body contracts, so the suspensory ligaments become less taut.
c. the lens becomes more rounded to better refract light rays.
d. the pupils dilate to let in more light for the retina.
Chapter 6 Solutions
21st Century Astronomy
Ch. 6.1 - Prob. 6.1ACYUCh. 6.1 - Prob. 6.1BCYUCh. 6.2 - Prob. 6.2CYUCh. 6.3 - Prob. 6.3CYUCh. 6.4 - Prob. 6.4CYUCh. 6.5 - Prob. 6.5CYUCh. 6 - Prob. 1QPCh. 6 - Prob. 2QPCh. 6 - Prob. 3QPCh. 6 - Prob. 4QP
Ch. 6 - Prob. 5QPCh. 6 - Prob. 6QPCh. 6 - Prob. 7QPCh. 6 - Prob. 8QPCh. 6 - Prob. 9QPCh. 6 - Prob. 10QPCh. 6 - Prob. 11QPCh. 6 - Prob. 12QPCh. 6 - Prob. 13QPCh. 6 - Prob. 14QPCh. 6 - Prob. 15QPCh. 6 - Prob. 16QPCh. 6 - Prob. 17QPCh. 6 - Prob. 18QPCh. 6 - Prob. 19QPCh. 6 - Prob. 20QPCh. 6 - Prob. 21QPCh. 6 - Prob. 22QPCh. 6 - Prob. 23QPCh. 6 - Prob. 24QPCh. 6 - Prob. 25QPCh. 6 - Prob. 26QPCh. 6 - Prob. 27QPCh. 6 - Prob. 28QPCh. 6 - Prob. 29QPCh. 6 - Prob. 30QPCh. 6 - Prob. 31QPCh. 6 - Prob. 32QPCh. 6 - Prob. 33QPCh. 6 - Prob. 34QPCh. 6 - Prob. 35QPCh. 6 - Prob. 36QPCh. 6 - Prob. 37QPCh. 6 - Prob. 38QPCh. 6 - Prob. 39QPCh. 6 - Prob. 40QPCh. 6 - Prob. 41QPCh. 6 - Prob. 42QPCh. 6 - Prob. 43QPCh. 6 - Prob. 44QPCh. 6 - Prob. 45QP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A group of students is given two converging lenses. Lens A has a focal length of 12.5 cm, and lens B has a focal length of 50.0 cm. The diameter of each lens is 6.50 cm. The students are asked to construct a microscope from these lenses that has the same magnification as the telescope in Problem 80 if possible, and they have this discussion: Avi: These are the same lenses we used to make a telescope. So they wont work as a microscope. Microscopes are for looking at close objects; telescopes are for looking at far objects. Cameron: All you need for a microscope are two converging lenses. I think the difference from a telescope is just that the order of the lenses is switched. A microscope is just a backward telescope. Shannon: I think the order of the lenses doesnt matter because the magnification is inversely proportional to both focal lengths. I think we have to adjust the distance between the lenses. a. What do you think? b. If a microscope can be constructed with these two lenses, describe its design. What is the minimum separation of the lenses? Where must you place the object?arrow_forward72. The image the lens of the eye forms on the retina is A. depends on the focal point of the eye B. real and inverted. C. real and erect. D. virtual and erect. E. virtual and inverted.arrow_forward22.A. The law that states the relationship between the incident and refracted rays is calledA. Snell's law.B. Fresnel's law.C. Einstein's law.D. Job's law.22.B. Which of the following was one of the first fiber-optic connectors (now obsolete)?A. BiconicB. LCC. EBD. MPOMTParrow_forward
- Everyone’s vision is compromised underwater, but some can see a bit better than others. Which of the following individuals would have the clearest underwater vision?A. A person with vision that requires no correction.B. A person with myopia.C. A person with hyperopia.D. A person with presbyopia.arrow_forwardDiverging light rays from a nearby object (a few focal lengths away from the mirror) strike the surface of a concave mirror. After reflecting from the mirror’s surface, the rays will converge at a. the mirror’s focal point. b. a point beyond the mirror’s focal point. c. a point nearer than the mirror’s focal point. d. none of the above.arrow_forwardThe direction that a light wave bends once it enters the refracted medium depends on a. The index of refraction of the incident medium only. b. The indices of refraction of both the incident and refracted media. C. The angle of incidence of the incident light ray only. d. The index of refraction of the refracted medium, only.arrow_forward
- The image formed by the concave lens is A. No image . B. Behind the lens. C. In front of the lens. D. In the focal pont.arrow_forwardA lens' virtual image: a. cannot be seen by looking back into the lens. b. is where the light rays appear to have originated. c. of an object can be seen if the observer stands behind the object and looks toward a lens in the same direction as the light is travels toward the lens. d. all of these. e. none of these.arrow_forward
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