What does cosmological redshift do to light?
A) stretches its wavelength B) makes it slow down
C) makes it brighter D) makes all light infrared
A
Physics & Space Science
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Power: A 100-W light bulb is operated by a 110-V dc source. What is the resistance of this bulb?
A. 100 ? B. 8.0 × 10-3 ? C. 6.0 × 10-3 ? D. 120 ? E. 240 ?
Physics & Space Science
If a red giant appears the same brightness as a red main sequence star, which one isfurther away?
a) the red giant b) we can't tell c) it depends on the phase of the Moon d) the main sequence star e) they are at the same distance
Physics & Space Science
For each 8-km segment of a satellite in close Earth orbit, the "drop" toward Earth is about
A) 5 m. B) 10 m. C) also 8 km.
Physics & Space Science
A lens that is thicker at the center than at the edge is called a(n) ______________ lens
Fill in the blank(s) with correct word
Physics & Space Science