a. accelerate due to gravity.
b. slow down.
c. bend towards the star due to gravity.
d. continue moving in a straight line.
e. change color to a shorter wavelength.
Anonymous
Favorite Answer
Depending on your point of view, either C or D.
You see... from the lights perspective, it is moving in a straight line. That's how light works. However, the space that it is moving through is being bent, so from our perspective we see it bending.
efflandt
Use the process of elimination. Light moves at constant speed, so that rules out a & b.
Color shift is a Doppler effect that can tell if a star is moving towards you or away from you, like the rise in pitch of sound moving towards you or lower pitch moving away. The color shift you see at dawn or dusk is not due to gravity, it is due to refraction.
A cathode ray tube (like an older TV) creates the image by bending an electron beam with magnets, so it is possible that enough gravitational force could bend light. A black hole has such strong gravity that it can suck in everything, including light.
Anonymous
a. accelerate due to gravity.
(speed of light is constant)
b. slow down.
(speed of light is constant)
c. bend towards the star due to gravity.
(this is the right answer)
d. continue moving in a straight line.
(no)
e. change color to a shorter wavelength.
(no)
VerM
This is where Newtonian physics fails and relativity takes over. Gravity doesn't alter the path of light - instead it alters the curvature of space-time that the light passes through. The light never stops going "straight," so to speak. It is merely that its "straight" path appears curved in the Euclidian sense
puj
c. bend towards the star due to gravity.