Ask Question
1 September, 08:45

Light travels at a constant speed of 3.0*108 m/s in a vacuum. (a) It takes light about 1.3 seconds to travel from the Earth to the Moon. Estimate the distance of the Moon from the Earth's surface, in meters. (b) The astronomical unit (abbreviated AU) is equal to the distance between the Earth and the Sun. One AU is about 1.5*1011 m. If the Sun suddenly ceased to emit light, how many minutes would elapse until the Earth went dark?

+1
Answers (1)
  1. 1 September, 12:14
    0
    Answer: a) 3,9 x 10^8 m

    b) 500 s = 8,33 minutes

    Explanation: We know that the average speed is distance/time

    so to calculate the distance Earth to Moon we use the above relation

    d Earth-Moon = Light speed * time

    On the other hand, to calculate the time when Earth will be dark,

    we calculate the spend time for the last ray of light coming from the sun

    so t = AU / Light speed
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “Light travels at a constant speed of 3.0*108 m/s in a vacuum. (a) It takes light about 1.3 seconds to travel from the Earth to the Moon. ...” in 📙 Physics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers