James Webb Space Telescope; formidable Victory to unleash Mystery. How does it work
Rafi Musfik Bhuiyan
It has always been a matter of due enthusiasm among scientists to unravel the whereabouts of the birth of the universe.Who knows,the star I am watching from my balcony is aged millions or billions of years or not!The universe is 13.7 billion years old and scientists predominantly believe in big bang theory in terms of origination of the universe.
James Webb Space Telescope is the largest and strongest telescope ever launched by Nasa on 25 December,2021 and how did it capture photo of the first galaxies 13 billion years ago?Let’s have a simple glimpse!
Do we ever think how we visualize things around us?Light is absorbed by materials and when they reflect the light,it creates sensation in our eyes and our brain creates the image.Light is so dynamic in terms of speed and the value is 300000000 meter per second and which is constant in any medium(including zero medium!)!It was proved by Michealson & Morley in 1887.Space is considered to be the zero medium.
The light takes up a certain time period to arrive into our eyes,having a massive speed,the time period is negligible for such distance.When it comes to space,distance is determined in light year.1 Light year refers to the distance that light can cover up by a year.
Light with massive speed, makes it so lucid to pursue that one light year is not a manikin distance.1 light year is equal to 9.46x1012 km (9460000000000 km!) unimaginable for us!Average distance among stars in our galaxy is approximately 4-5 light years.
When we get to observe any of the stars in the sky scintillating,it is not the present state of the star we see!
The distance between sun and earth is about 150 million km and by calculation the duration for light to reach the earth is around 8 minutes.If we look at the sun,even if it’s hard and harmful for eyes,we see the face of the sun that was 8 mins ago and we will be able to see the present state after 8 mins.
Accordingly, the James Webb Telescope with it’s advanced lens and mirror,could bring us the view of first fromed galaxies and it is so distant that light has to arrive so long distance.It is all about a delay of light to arrive and if we want to see the present state of the view,it will be possible after 13 billion years.Await the light!
