Concept explainers
& The Moon**#x2019;s Mare Imbrium The outermost ring of mountains surrounding the Mare Imbrium on the Moon has a diameter of 1300 km. What diameter objective lens telescope would allow an astronomer to see the ring of mountains as a distinct feature of the Moon’s landscape? What assumptions did you make? The average center-to-center distance from the Earth to the Moon is 384,403 km, which is about 30 times the diameter of the Earth. The Moon has a diameter of 3474 km.
![Check Mark](/static/check-mark.png)
Want to see the full answer?
Check out a sample textbook solution![Blurred answer](/static/blurred-answer.jpg)
Chapter 24 Solutions
College Physics: Explore And Apply, Volume 2 (2nd Edition)
Additional Science Textbook Solutions
Conceptual Physical Science (6th Edition)
The Cosmic Perspective (8th Edition)
Tutorials in Introductory Physics
Lecture- Tutorials for Introductory Astronomy
Cosmic Perspective Fundamentals
University Physics with Modern Physics (14th Edition)
- Imagine that you are the head of a funding agency that can afford to build only one telescope. Which of the four proposed telescopes below would be best to support? OA. a radio telescope in orbit above the Earth B. A gamma ray telescope in orbit above the Earth OC. An x-ray telescope located on a mountain in Peru D.An ultraviolet telescope located in the Mojave desertarrow_forwardImagine that you are the head of a funding agency that can afford to build only one telescope. Which of the four proposed telescopes below would be best to support? O A. a radio telescope in orbit above the Earth B. A gamma ray telescope in orbit above the Earth O C. An x-ray telescope located on a mountain in Peru D. An ultraviolet telescope located in the Mojave desertarrow_forwardWhat is the ratio of the light-gathering power of a 10-meter telescope to that of a 1‑meter telescope? a. 10 to 1 b. 1 to 10 c. 100 to 1 d. 1 to 100 e. 3.2 to 1arrow_forward
- 2- Calculate the brightness of 3mw He-Ne laser and 1 cm in diameter? 3- The divergence of the laser beam after sending it through a telescope is 10 rad - 6 What is the diameter of the spot formed on the moon surface if the laser is directed towards the earth? (The distance from earth to the moon is (3.8 x10 km) (the laser beam diameter is 2mm).arrow_forwardThe Moon has no sustained atmosphere. What advantages would you have if you built an observatory on the lunar surface? (Select all that apply.) a. On Earth, large mirrors in telescopes can sag under their own weight. Without an atmosphere to apply pressure, mirrors on the Moon would not sag. b. We could observe during the day. Without an atmosphere, sunlight is not scattered and the sky remains dark. c. We could observe continuously, because there would never be any clouds. d. The Moon is closer to many stars than the Earth, and lunar-based telescopes would produce images with more detail based on this closer proximity. e. There is no atmosphere to absorb or scatter radiation, so all wavelengths of light could be observed with lunar-based telescopes, from radio waves to gamma rays. f. Distortion of mirrors due to temperature shifts would no longer be an issue, without an atmosphere to retain the heat from sunlight. g. Without atmospheric turbulence, there would be no…arrow_forwardWhich of the following is NOT a characteristic of the next generation of planned telescopes? Answers: A. multiple focus points B. extreme size C. segmented mirrors D. adaptive optics E. multiple wavebandsarrow_forward
- The Very Long Baseline Array (VLBA) is a. the highest resolution optical telescope ever built. b. located in Arecibo, Puerto Rico. c. a matched pair of 8-meter telescopes, one of which is in Chile and the other in Hawaii. d. an airborne infrared telescope. e. a set of radio telescopes linked together electronically to provide very high resolution.arrow_forwardinclude #include using namespace std; int main() { const int MAXPOINTS = 100; int i, npts, nval[MAXPOINTS]; double x, fval, ymin, ymax, width, sval[MAXPOINTS]; char label[] = " y axis"; char axis[] = "+---------------------------------------------------->"; char line[] = "| "; ymax = 1.0e-5; ymin = 1.0e5; width = 53; // Load the data to be plotted and find the max and min values i = 1; for (x = −5.0; x ymax) ymax = sval[i]; if (sval[i] < ymin) ymin = sval[i]; i++; if (i >= MAXPOINTS) break; // don't exceed the maximum points } npts = i − 1; // Scale all the y values for (i=1; i |* |* |* |* |* |* |* |* |* |* |* |* |* |* |* |* |* |* |* |* |* Please modify to question 15arrow_forwardWhich of the following describes interferometry? a. It is used to improve resolving power. b. It decreases the chromatic aberration of a telescope. c. It works only for large X-ray and ultraviolet telescopes. d. It requires that radio telescopes be within a few hundred feet of each other. e. None of the above statements are true.arrow_forward
- When two objects are far away, an observer moving will see a shift of the closest object relative to the farthest object. This shift is known as a.triangulation. b.parallax. c.a baseline. d.a degree. e.an arc second. What advantages do large telescopes have over smaller ones? a.larger collecting areas b.both superior angular resolution and less aberration c.superior angular resolution d.less aberration e.better exposure times What is the name given to a day which uses the stars as a reference? a.solar day b.diurnal day c.sidereal day d.orbital day e.none of the mentioned choicesarrow_forwardPeople are often bothered when they discover that reflecting telescopes have a second mirror in the middle to bring the light out to an accessible focus where big instruments can be mounted. “Don’t you lose light?” people ask. Well, yes, you do, but there is no better alternative. You can estimate how much light is lost by such an arrangement. The primary mirror (the one at the bottom in Figure 6.6) of the Gemini North telescope is 8 m in diameter. The secondary mirror at the top is about 1 m in diameter. Use the formula for the area of a circle to estimate what fraction of the light is blocked by the secondary mirror. Figure 6.6 Focus Arrangements for Reflecting Telescopes. Reflecting telescopes have different options for where the light is brought to a focus. With prime focus, light is detected where it comes to a focus after reflecting from the primary mirror. With Newtonian focus, light is reflected by a small secondary mirror off to one side, where it can be detected (see also Figure 6.5). Most large professional telescopes have a Cassegrain focus in which light is reflected by the secondary mirror down through a hole in the primary mirror to an observing station below the telescope.arrow_forwardImagine that a spacecraft has landed on Mercury and is transmitting radio signals to Earth at a wavelength of 10.000 cm. When Mercury is seen from Earth in the evening sky, at its greatest angular distance east of the Sun, it is moving toward Earth at its maximum possible relative speed of 47.9 km/s. To what wavelength must you tune your radio telescope to detect the signals? (Hint: Use the Doppler formula in Reasoning with Numbers 6-2.)arrow_forward
- Horizons: Exploring the Universe (MindTap Course ...PhysicsISBN:9781305960961Author:Michael A. Seeds, Dana BackmanPublisher:Cengage LearningAstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStaxStars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage Learning
- Foundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning
![Text book image](https://www.bartleby.com/isbn_cover_images/9781305960961/9781305960961_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781938168284/9781938168284_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337399944/9781337399944_smallCoverImage.gif)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337672252/9781337672252_smallCoverImage.jpg)
![Text book image](https://www.bartleby.com/isbn_cover_images/9781337399920/9781337399920_smallCoverImage.gif)