An explosion occurs on a star which is 95 light years away. it is likely that you will be able to see it on the earth?
Answers
Answer:
\(1\) light year is the distance travelled by light in one year. As the star is \(95\) light years away, light will take \(95\) years to reach to earth from the star. As normal human life is lesser than \(95\) years, it's unlikely that we will see this light on earth.
Concept:
The distance that light travels in a light-year is one year. At 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year, light travels through interstellar space. We gauge the immense distances of space using light-time. It measures the distance that light covers in a certain amount of time.
Given:
A star explodes which is 95 light years away.
Find:
After how much time we could see the star explodes.
Solution:
Light travels a specific distance in one year, or one light year. The only reason a star 95 light years distant (or any distance away) could be seen through a telescope is because nuclear fusion is possible since all the mass is concentrated. If the star explodes, the materials inside it would be dispersed in various directions, causing the star's luminosity to gradually decline while growing larger. Therefore, at some point, the star won't be visible since we need less photons from each pixel to see than are being released.
After 95 years of explosion, we will be able to observe that. After 8 minutes and 20 seconds, we would know even if the sun disappeared. It takes that long for sunlight to reach the surface of the planet. 9.4607 x 10^12 km is the distance that light travels in a year (nearly 6 million million miles).
Hence, we will see the explosion after 95 years.
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