Physics, 10.01.2020 22:31 nataliam0430

Light travels at a constant speed of about 300,000 km/s. this speed is referred to as the speed of light. a light year is the distance that light travels in one year. one light year is equal to 9.46 trillion kilometers. the closest star to earth, other than the sun, is proxima centauri. it takes light from this star about 4.2 years to reach earth. how far from earth is the star proxima centauri? a. 4.2 light years b. 9.46 trillion km c. 300,000 light years d. 300,000 km.

Answers: 2

Show answers

Other questions on the subject: Physics

Physics, 22.06.2019 08:00, osmanysalvador9

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance

Answers: 3

continue

Physics, 22.06.2019 23:50, bneilesauger

What would be the radius of the earth if it had its actual mass but had the density of nuclei? express your answer to two significant figures and include the appropriate units.

Answers: 2

continue

Physics, 23.06.2019 03:00, cc14ty

Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2 . how much is the spring compressed x from its natural length?

Answers: 3

continue

Physics, 23.06.2019 08:30, ap03baller

Meaning of a nonzero y-intercept to a graph of reaction distance versus speed

Answers: 1

continue

You know the right answer?

Light travels at a constant speed of about 300,000 km/s. this speed is referred to as the speed of l...