21st Century Astronomy 6E
6th Edition
ISBN: 9780393690675
Author: Laura Kay, Stacy Palen, George Blumenthal
Publisher: W. W. Norton
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Chapter 6, Problem 34QP
To determine
The aperture of radio telescope that required for the resolution of 1.5 arcmin and state the reason why humans are not able to see radio waves even it can pass through Earth’s atmosphere.
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The James Webb Space Telescope has a primary mirror of diameter ? = 6.5metres. When observing at 1100nm wavelength, calculate the minimum angular separation between two stars which can just be resolved; give your answer in arcseconds (arcsec), where 1 arcsec = 1/3600 degree, to 3 decimal places.
The Giant Magellan Telescope is a new telescope being built in Chile with a mirror 25 meters in diameter.
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Chapter 6 Solutions
21st Century Astronomy 6E
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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- Theoretically (that is, if seeing were not an issue), the resolution of a telescope is inversely proportional to its diameter. How much better is the resolution of the ALMA when operating at its longest baseline than the resolution of the Arecibo telescope?arrow_forwardHow much more light can the Keck telescope (with its 10-m diameter mirror) gather than an amateur telescope whose mirror is 25 cm (0.25 m) across?arrow_forwardMany decades ago, the astronomers on the staff of Mount Wilson and Palomar Observatories each received about 60 nights per year for their observing programs. Today, an astronomer feels fortunate to get 10 nights per year on a large telescope. Can you suggest some reasons for this change?arrow_forward
- Two identical stars are moving in a circular orbit around one another with an orbital separation of 2 AU. The system lies 200 light-years from Earth. If we happen to view the orbit head-on, how large a telescope would we need to resolve the stars, assuming diffraction-limited optics at a wavelength of 2 μm?arrow_forwardIntro to Astronomy: Calculate the angular resolution of the HST (Hubble Space Telescope) operating in green light of wavelength 0.50 (mm). The HST mirror diameter is 2.4 (m). Use formula: Angular resolution (arc seconds) NOTE: wavelength must be in (mm) and mirror diameter in (m) Angular resolution = Q1 =arrow_forwardOne of the instruments on board the Unreal X-ray Observatory (UXO) has a detector with 3600 pixels x 1800 pixels and a field of view of 30 ar- cmin x 15 arcmin. If each pixel is 24 µm x 24 μm in size, calculate the plate scale, in arcsec mm-¹, and hence determine the focal length of the UXO telescope.arrow_forward
- An astronomer wants to design an infrared telescope with an angular resolution of 1.5 arcseconds at a wavelength (L, in our equation) of 20 micrometers. What would be the diameter (D) of the mirror they would need to make?arrow_forward(It's actually astronomy) What if you had to scout for a site to build a new ground-based, optical telescope. What characteristics would an excellent site possess? Name at least two.arrow_forwardThe resolving power of a 10-centimeter (4-inch) telescope is 1.16 seconds of arc. What is the resolving power of the 40-inch (100‑cm) Yerkes refractor?arrow_forward
- Why is it that radio telescopes need to be so larger or organized in arrays?arrow_forwardLet’s say that we have a radio dish that is 22 meters in diameter. It is designed to detect radio waves at 0.00006 centimeters in wavelength. What is the maximum resolution, or diffraction limit, of this telescope in arcseconds? (Make sure to show all calculations with units and show/explain any conversions.)arrow_forwardWhen astronomers discuss the apertures of their telescopes, they say bigger is better. Explain why. a) A wider aperture can observe a significantly larger portion of the sky. b) A wider aperture makes a telescope easier to aim. c) A wider aperture allows a telescope to collect more light, so it can produce images with higher resolution. d) A wider aperture allows a telescope to collect more light, so it can detect fainter light sources.arrow_forward
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