Gravitational waves – level 3
“Ladies and gentlemen… We have detected gravitational waves. We did it!”
“A gravitational wave is a ripple in space and time. Einstein told us space and time respond to matter within it, and just like the surface of a pond if you put your finger into a pond and move it, you create water waves. The same thing happens as mass moves through space-time; it creates ripples, those are the gravitational waves.
We’ve known about them nearly a hundred years, so one year or so after Einstein came up with his theory of general relativity, he discovered gravitational waves, but it’s taken this long to actually detect them.
As a gravitational wave passes through space and time, it changes the distance between two objects that are just freely sitting there in space and time, and so what LIGO and gravitational wave detectors try and do is to create objects that are suspended in such a way that they’re free to move in some directions, and then when a gravitational wave moves past and changes the space and time, it actually changes the distance between these objects and then LIGO, for example, measures that distance change by bouncing a laser beam between these masses.”
“What’s really exciting is what comes next. Four hundred years ago, Galileo turned a telescope to the sky and opened the era of modern observational astronomy. I think we’re doing something equally important here today. I think we’re opening a window on the universe, a window of gravitational wave astronomy.”
“It is potentially possible, depending on how the universe started, that the echo from the very beginning, the earliest epoch in the universe may be detectable as a gravitational wave signal. Because the gravity waves are so weak they’ve been preserved pristinely and there will be an amazing way to view this very early epoch.”
Difficult words: ripple (a small wave), matter (material, thing), detect (to measure, to notice, to see), suspend (to hang), bounce (to come into contact with something and then be reflected back), beam (a ray, bits of light), epoch (an era, an age), pristinely (perfectly).
LEARN 3000 WORDS with NEWS IN LEVELS
If you read and listen to two articles every day, your reading and listening skills can improve fast. You can learn quickly and after some time you will not have to translate into your own language. You will simply understand. Why should you do this?
When you listen to people in your native language, you do not translate. You simply understand. The same has to be in English. When you learn English, you have to learn the whole sentences in context.
Students, who translate English texts, do exercises and do tests are very good at translating, doing exercises and doing tests, but they have problems with understanding English in real life. In real life, nobody waits for your translation. People usually use simple English when they speak but they use it fast. You have to understand with no translation to your native language. If you translate, you cannot be part of communication because you are thinking about the language too much. These words are maybe hard to read but they are true.
You also have to hear every new word 5 to 10 times if you want to remember it. That’s why we use the same words in one level. If you read and hear the same words again and again, you will understand them and remember them. If you know words from one level, you can go to a higher level and learn new words. It is important to go step by step, and read and listen to words which are used in English often. This is what we do with our news. In our short news, we use words which are used in English often. Level 1 has the 1000 most important words. Level 2 has the 2000 most important words, Level 3 has the 3000 most important words.
So, if you want to understand English fast and learn fast, read two articles or more a day. You can improve your reading and listening quickly when you read easy English news. We will help you learn English fast and understand it. When you use this website every day, you can learn 3000 words which you need for communication with anybody in English.
How to improve your English with News in Levels:
- Read all today’s articles and translate all words which you don’t understand.
- Read the articles from the day before and see if you remember all new words.
- Listen to all today’s news.
- Stop the video after every sentence and repeat the sentence.
- Repeat point 2 for the news which you listened to the day before.
- Answer the questions under today’s news and write them into the comments.
- Chat in our Facebook Group for at least 2 minutes. You can write about today’s news.