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 15QP
To determine
The result of increasing the quantum efficiency of human eye.
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1. A star in a distant galaxy approaches the Sun at 3 X 106 m/s. It emits a photon with a wavelength of 0.4 microns. Apply the Doppler Effect to estimate the observed wavelength of this photon.
2. An object is 2 meters from a thin lens with a focal length of 50 cm. Apply the thin-lens equation to calculate the image distance from the lens and magnification.
A device that analyzes light by spreading it out according to wavelength is called a(n)
a.
interferometer.
b.
camera.
c.
photometer.
d.
spectrograph.
7. A typical Geiger-Muller counter is a cylindrical detector with an aperture 50 mm in
diameter. What is the solid angle if a point isotropic source is located 0.10 m away from
the detector?
Choose the
answer
a) 0.1875
b) 0.1687
c) 0.1798
University
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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- 10. To produce coherent light from an ordinary incandescent light bulb you need A. Wavelength filter, third filter and spatial filter B. Wavelength filter, Candle and spatial filter C. Wavelength filter, Incandescent light bulb and laser D. Wavelength filter, Incandescent light bulb and spatial filterarrow_forwardRadio 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.arrow_forwardState following statements whether TRUE or FALSE. i. We can see ordinary solid objects because light is refracted from them. ii. At room temperature the thermal radiation are in infrared region of the spectrum. iii. Our eyes are sensitive to ultraviolet light. iv. Upon heating, objects begin to emit visible light. Temperature of a piece of metal is increases; first it glow with deep red color and then it turns to yellow. V.arrow_forward
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