For a time dilation to increase the "time" by a factor of 2, the speed of the object is

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Quizplus · Accepted Answer

The time dilation factor, often represented by the Greek letter gamma (γ), is calculated using the formula γ = 1 / sqrt(1 - v^2/c^2), where v is the velocity of the object and c is the speed of light. For the time dilation to increase the time by a factor of 2, we set γ = 2, which gives us 1 / sqrt(1 - v^2/c^2) = 2. Solving for v/c gives us v/c = sqrt(1 - (1/4)) = sqrt(3/4) = 0.866. Therefore, the speed of the object must be approximately 0.87 c.

For a Time Dilation to Increase the "Time" by a Factor