Using this reasoning he shows that proper time is always shorter for an object. accelerated than for an inertial object. Langevin uses experience with twins to illustrate this phenomenon. One of twins being accelerated, its own time will be shorter than that of its brother remained on Earth.

### What is the probability that both children are boys knowing that at least one of them is a boy?

Smith is a boy (GG), the answer “a boy ” to the probability of the situation, either 1/3 also. The probability that Mr. Smith responds “a boy ” then thathe also has a daughter (GF or FG) or so thathe has a second boy (GG) are therefore equal, which means that the probability thathe has a second boy is 1/2.

### Why does time pass faster when you are old?

In a study published a few days ago, an American researcher from Duke University (North Carolina) explains that as we age, our brain loses cognitive abilities and therefore puts more time to store memories, which gives the feeling that the time is accelerating.

### Who shaves the barber?

One version of Russell’s paradox, known as the “Paradox of barber “, depicts a village whose, every day, the barber shaves only those who do not shave themselves, and only these.

### How to get out of a time loop?

The usual way for the protagonist to get out of a time loop is therefore to acquire knowledge, using the conservation of one’s memory to progress and finally leave the loop.

### What is the probability of having a boy?

If we talk about probability pure, we is sensible to have 50% chance ofhave a boy or a daughter Everytime. In reality, itis rather 51% Boy and 49% Daughterbecause they are a little more numerous on earth. It works for every child, every new pregnancy gives a 50% chance.

### How to calculate the twin paradox?

However, one of the lessons of the twin paradox is that the time differences between the clocks can be calculated according to the difference in the lengths (space-time interval) of the world lines of the clocks to be compared.

### What is the name of the movie that tells about the paradox of the twins?

In 2014, the science fiction film Interstellar directed by Christopher Nolan also implements the twin paradox. This cinematographic work tells the story of a father having to go into space to find a habitable planet, and of his children remaining on Earth.

### What is the difference between inertial cue and twin paradox?

This time, Bernard and Alain both perform a circular trajectory (in the inertial frame) but in opposite directions. From the point of view of the inertial frame, the situation is similar to that of the previous case or the paradox of the twins.

### What is Twin Asymmetry?

This approach was suggested by Langevin as early as 1911, to exhibit an asymmetry between the two twins, and resolve the paradox, which only exists if the situation of the twins is considered to be symmetrical. It was first studied in detail by Charles Galton Darwin in 1957.