21ST CENT.AST.W/WKBK+SMARTWORK >BI<
6th Edition
ISBN: 9780393415216
Author: Kay
Publisher: NORTON
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Chapter 6, Problem 5QP
To determine
The reason for better resolution of a set of radio telescopes than a single dish telescope.
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The Hubble Space Telescope, orbiting above Earth’s atmosphere, eliminates the blurring effect of Earth’s atmosphere and permits the telescope to
a.
observe gamma rays.
b.
observe wavelengths from the near infrared to the near ultraviolet.
c.
receive radio wavelengths.
d.
transmit radar pulses that reflect off the surface of the moon.
Radio telescopes have poor resolving power because
a.
their diameters are so large.
b.
the energy they receive is not electromagnetic radiation.
c.
radio waves have long wavelengths.
d.
a and b are true.
e.
none of the above are true.
In a radio interferometer with two dishes, the distance between the two dishes determines the
a.
magnifying power
b.
light-gathering power.
c.
resolving power.
d.
level of interference from terrestrial radio sources.
e.
energy distribution.
Chapter 6 Solutions
21ST CENT.AST.W/WKBK+SMARTWORK >BI<
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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- 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_forwardThe main reason for creating an interferometer with two separate radio dishes is to a. monitor two different radio wavelengths simultaneously. b. increase the intensity of the detected signal. c. compare objects in two different directions simultaneously. d. increase the resolution in the data.arrow_forwardRadio waves have wavelengths that are typically many centimeters, or even meters. Radio telescopes also tend to have diameters that are much larger than optical telescopes. They are sometimes 25, 50, even 100 m in diameter. In fact, the Arecibo radio telescope in Puerto Rico is about 300 m in diameter. How does the resolution of the Arecibo telescope observing radio waves of wavelength 10 cm compare to that of a 1-m diameter optical telescope observing in green light with a wavelength of 500 nm? Explain why radio telescopes are so large.arrow_forward
- 10. Capella Space is a company that launches and operates satellites. This company's satellites collect global images that are of significantly higher resolution than images collected by other satellites. The images are formed by the satellite transmitting and 'bouncing' microwave signals off the Earth, with the image formed from the returning signals. Unlike optical technology (which uses ambient visible light from the Sun which reflects off the Earth), microwaves allows the telescope to 'see' through smoke, clouds, or air pollution, and the images can also be collected at night. The images are collected each hour and allow scientists to constantly monitor the Earth and to respond to environmental challenges such as oil spills, forest fires, and crop production levels. Capella Space is part of the Space Net™ partnership that provides satellite imagery for researchers and developers to use in the fields of conservation, security services, and mapping. An example of Capella's high-res…arrow_forwardWhich of these does NOT describe an effect of the atmosphere on astronomical observation? Answers: A. Filtering out infrared and other wave bands. B. Unsteady or turbulent air. C. Decreased light-gathering power. D. Scattering light from nearby cities. E. Weather conditions.arrow_forwardThe resolution of a scanning confocal microscope is limited by diffraction, just as for a regular microscope. In principle, switching to a laser with a shorter wavelength would provideA. Greater resolution.B. Lesser resolution.C. The same resolution.arrow_forward
- A device that analyzes light by spreading it out according to wavelength is called a(n) a. interferometer. b. camera. c. photometer. d. spectrograph.arrow_forwardThe telescope of a spy satellite is reputed to be able to resolve objects 9 cm apart from an altitude of 180 km above the surface of Earth. 1) What is the diameter, in meters, of the telescope’s aperture, if its resolution is limited only by diffraction effects? Take 550 nm for the wavelength of light.arrow_forwardOptical Engineering 2: Tutorial 1 1. Visible light covers the range of wavelengths 380 to 740nm. Optical communications widely use 1300 nm and 1550 nm. What values of frequency do all these wavelengths correspond to? (c = 3.0 x 10* ms-) 2. An given optical fibre has an optical loss of 0.2 dB km- at a wavelength 1.55 m. Over what distance in the fibre would the light power level drop by one half? 3. You are at the bottom of a swimming pool, looking up. What do you see? The refractive index of water is 1.33, therefore what is the angular size of any feature? 4. A light ray enters a rectangular block of glass (n = 1.5) of width 20 mm at an angle of 30° to the normal. What is the displacement of the ray after propagating through the block? 5. Calculate the focal length in air of a thin biconvex lens (n=1.5) having radii 20 mm and 40 mm. What is the focal length if the lens is placed in water? 6. An object of size 20 mm is positioned near to the optic axis 75 mm from a positive lens of…arrow_forward
- How to solve this problemarrow_forwardThe resolving power of telescope of aperture 100 cm for light of wavelength 5.5 × 1077 m is ..... (a) 0.149 × 10² (b) 1.49 x 10² (c). 14.9 × 10² (d) 149 × 10²arrow_forwardWhy is it advantageous to use a large-diameter objective lens in a telescope? (a) It diffracts the light more effectively than smaller-diameter objective lenses. (b) It increases its magnification. (c) It enables you to see more objects in the field of view. (d) It reflects unwanted wavelengths. (e) It increases its resolution.arrow_forward
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