Author Question: As a spaceship approaches the event horizon of a black hole, its radio transmissions would A) be ... (Read 80 times)

meagbuch · **on:** Jul 27, 2018

As a spaceship approaches the event horizon of a black hole, its radio transmissions would

A) be sucked into the black hole.
B) shifted to infrared or even visible light.
C) shifted to longer wavelength.
D) increase in amplitude.
E) be unchanged.

Question 2

An angle of 1 arcsecond is

A) about the width of your fist held at arm's length.
B) about the width of a finger held at arm's length.
C) less than the thickness of a human hair held at arm's length.
D) slightly more than the width of a basketball held at arm's length.