Some lobes of radio galaxies are in fact moving faster than the speed of light
Indicate whether the statement is true or false
FALSE
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Imagine we have an adjustable slit that we can make wider or narrower. If we shine light of a fixed intensity on the slit, and then crank the slit so its width decreases (while keeping other things the same), will the light at the center of the central peak on the display screen (A) remain the same, (B) get brighter, or (D) get dimmer?
A. Remain the same B. Get brighter D. Get dimmer
In a spectroscopic binary, if a pair shows a combined set of lines tonight, but a maximum split two nights later, its orbital period must be:
A) one day. B) two days. C) four days. D) eight days. E) twelve days.
An object is placed 40 cm in front of a lens of focal length 40 cm. A second lens is placed 17 cm beyond the first. An image forms 48 cm past the second lens. The lateral magnification of this system is
A) -2.8. B) -1.2. C) 1.2. D) 2.8. E) impossible to determine with the information given.
A negatively charged rod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be charged
A) positive. B) negative. C) neutral. D) none of the given answers