21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 6, Problem 40QP
(a)
To determine
The angular resolution of array.
(a)
To determine
Compare the resolution calculated in part (a) with that of the given interferometer.
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1. If the cross-track angular resolution of a satellite sensor at nadir is given by 1.4 /D where is the
wavelength being observed and D is the aperture size of the sensor, what is the cross-track spatial resolution on the
ground if D = 80 cm and the satellite sensor is at an orbital height of 600 km?
(a) for an infrared sensor observing wavelengths at 20 microns?
(b) for a microwave sensor observing wavelengths at 1.5 cm?
=
a) Describe what is meant by the term Point Spread Function (PSF), explain the
relationship between the PSF and the aperture (entrance pupil) of a telescope.
You should refer to the ideas of diffraction and Fourier Optics in your answer.
b) Determine the plate scale and theoretical resolving power at a wavelength of
380 x 10-9 m of a telescope with 2 m aperture diameter and focal length of 4m.
4. For a space-based imaging system that uses a fixed size aperture for both visible and infrared sensors, given the characteristics listed, what would be the theoretical resolution for each of the sensors? Aperture diameter = 1.1 m. Visible wavelength = 0.5 micron. IR wavelength = 2.0 micron. Altitude = 400 km. (note: 1 micron = 1E-6 m)
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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- What is the resolving power of a 25-cm (10-in.) telescope at a wavelength of 550 nm (in the middle of the visual band)?arrow_forward7) What is the angular resolution of a 5-meter lens diameter telescope at a wavelength of 500 nm? a. 1.22x10^-7 b. 1.22x10^-6 c. 2.44x10^-7 d. 2.44x10^-6arrow_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? 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_forward
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- A space-based telescope can achieve a diffraction- limited angular resolution of 0.10" for red light (wavelength 680 nm). A Part A What would the resolution of the instrument be in the infrared, at 4.9 um ? Express your answer using two significant figures. -- ΑΣΦ α = Submit Part B Request Answer α = ? What would the resolution of the instrument be in the ultraviolet, at 50 nm ? Express your answer using two significant figures. 195) ΑΣΦ arc seconds ? arc secondsarrow_forwardH does the resolving power of the 5-rn telescope on Mount Palomar near San Diego compare with that of the 2.5-rn Hubble Space Telescope? Why does the HST generally still outperform the Palomar 5-rn telescope?arrow_forwardThe angular resolution of a radio telescope is to be 0.100 when the incident waves have a wavelength of 3.00 mm. What minimum diameter is required for the telescopes receiving dish?arrow_forward
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