Question

Which describes why people on earth can see light from the stars in the sky that are so far away?

A.
Light from the stars is visible light and travels in longitudinal waves. Longitudinal waves require a medium to travel; therefore, light is reflected off particles of matter in space to be seen on the earth.

B.
Light from the stars is visible light and travels in electromagnetic waves. Electromagnetic waves require a medium to travel; therefore, light is reflected off particles of matter in space to be seen on the earth.

Answer 1

C.
Light from the stars is visible light and travels in electromagnetic waves. Electromagnetic waves do not require a medium to travel; therefore, light travels through the vacuum of space to be seen on the earth.

D.
Light from the stars is visible light and travels as surface to surface waves. Surface waves require a medium to travel; therefore, light travels from the surface of the star to the surface of the earth.

Answer 2

C

Answer 3

I would go with C. When light travels through a medium (like air, water, glass), some of it is reflected and absorbed and scattered. But traveling through a vacuum (like outer space) none of this happens. So the light can travel straight toward us without anything getting in the way.

Answer 4

with what jimflan24 said "So the light can travel straight towards us without anything getting in the way" this statement is incorrect, some lights we see from stars are behind large objects of mass in the way but with these large objects gravitational pull can bend the light coming from an object so "C" is still correct but his last statement is flawed. https://www.google.com.au/?gws_rd=ssl#safe=strict&q=light+bending

Answer 5

it would be c