Recent content by Platformance

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    Question about the x term in time dilation

    I see, I wasn't quite sure of how the time dilation equation worked when I started this thread, but I understand it more clearly now. Thank you! The graphs and explanation made this concept much easier to understand, and I didn't expect to learn the relativistic doppler when I started this...
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    Question about the x term in time dilation

    I was trying to say that an event happens at coordinate time 1.1547 in the rest inertial frame of the planet, but this event happens at the spaceship's proper time of 1. So the time dilation equation, t' = γt. Where in the rest inertial frame of the planet, t' is the coordinate time, t is...
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    Question about the x term in time dilation

    Okay the frame I was dealing with would be the frame of the planet in the diagram on post 17. At t = 1 and x = 0 in the frame of the planet, t' =1.1547. 1.1547 is the coordinate time, but the proper time on the spaceship is 1. The observer does not see the spaceship clock at 1 when the...
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    Question about the x term in time dilation

    Isn't \nu_{source} the observer time and \nu_{observed} the spaceship time? When the spaceship time is -1 the observer time is -0.577. I think I understand now: The equations t' = γ(t-xβ) and x' = γ(x-tβ) replicate an event from 1 frame to another. When the clock on the planet strikes...
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    Question about the x term in time dilation

    So in the rest frame of the spaceship, the coordinate time and proper time are only equal at x = = 0. If an event happens anywhere else, the time that the event happens is the coordinate time, but there is no proper time because the spaceship does not pass through the event. \nu_{observed} =...
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    Question about the x term in time dilation

    Could you please explain what you mean by a coordinate effect, the way I see it the coordinate time is the proper time in the reference frame that the calculations are based on. The equation I found was: \nu_{observed} = \nu_{source} \sqrt{\frac{1+\beta}{1-\beta}} \nu_{observed} comes...
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    Question about the x term in time dilation

    Thank you for all your help! =) So to summarize: When the observer's clock ticks 1 second, the spaceship's clock ticks 0.866s from time dilation. At 1 second, the observer sees an event and sees the spaceship's clock at 0.577s due the relativistic doppler effect (I couldn't find the...
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    Question about the x term in time dilation

    So the 0.866s represents a fraction of distance between the points for the black line and not the total distance, but the black dots are a distance 1.1547 away. Does this mean that when the planet's clock tick 1 second, the observer sees an event, but when the clock ticks 1.1547 seconds, the...
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    Question about the x term in time dilation

    So t' = γ(t - vx/c2) and t' = γ(t - xβ) are the same except x in the second equation is in the unit of light seconds. I assume this also applies to x' = γ(x-tβ), where x' = γ(x-vt), v = β/c and c = 1. As for the 0.75s and 0.25s, I realized I forgot the square root when I solved for γ, so...
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    Question about the x term in time dilation

    The equation t = γ(t' + x'v/c2) creates t = γ(t' + t'β) with β=v/c and t' = x'/c, or t' = γ(t - xv/c2) into t' = γ(t - tβ). I am not sure where t' = γ(t - xβ) comes from. Are you talking about t = γ(t' + x'v/c2) or t' = γ(t - xβ)?
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    Question about the x term in time dilation

    I think I am starting to understand this now, the second equation doesn't describe an interval of time, but a moment in time. This equation t' = γ(t-xβ) (should this be t' = γ(t-tβ) instead?) calculates the time an event happens in the frame of s' given the time and position of the event...
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    Question about the x term in time dilation

    So x is the distance between frames, then this is my problem. Suppose a spaceship travels past at 0.5c, the spaceship passes an observer on a planet. The observer measures 1 second on his clock and a clock on the spaceship will spin for 0.75s using the time dilation formula. However, after 1...
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    Question about the x term in time dilation

    When I first learned time dilation I was given this equation proven using the light clock example. t = γt' However, when I looked into the topic in more detail, I was given this equation. t = γ(t' + xv/c2) If x represents the distance between 2 frames, then does x have to change...
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    Proving Convergence of Direct Comparison Test for \sum \frac{3}{n^{2} + 1}

    So that means I would need to compare the series to \frac{3}{n^{2}} instead. I can prove \frac{3}{n^{2}} through the integral test. Though speaking of the integral test, it doesn't seem like the test works for the original series since I am getting tan-1(∞). So would the integral test be...
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    Proving Convergence of Direct Comparison Test for \sum \frac{3}{n^{2} + 1}

    Homework Statement Show that: \sum \frac{3}{n^{2} + 1} converges from n = 1 to ∞ Homework Equations If Ʃbn converges, and Ʃan < Ʃbn. Ʃan also converges. The Attempt at a Solution \sum \frac{1}{n^{2}} converges \sum \frac{3}{n^{2} + 1} = 3 * \sum \frac{1}{n^{2} + 1}...
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