by guardian on August 3rd, 2009

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Creationist Mathematics question: If light was slowing down exponentially and now it travels at 186,000mps and it started coming toward us 6000 years ago from the farthest star, and the farthest star is 7.6X 10^19 miles away, how fast was light going

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  • by Quirkie on August 3rd, 2009

    Quirkie

    A light year is about 5.9x10^12 miles, so the star you gave is 1.3x10^7 light years away.

    "slowing down exponentially" would mean that
    speed_of_light_at_time_t_years_ago = c e^(k times t_years_ago)

    Distance travelled by light in time t = integrate speed with respect to time.

    Distance travelled by light in last 6000 years
    [(c/k) (e^(6000 k) - 1)] = 1.3x10^7
    (c is exactly 1 light year per year)

    Solve for k, gives k = 0.00166 approx

    6000*k = 10 approx
    So 6000 years ago, light would have been e^10 times faster - about 22000 times faster.

    Now, is this theory correct?
    The speed of light was measured in 1728 to be within 1% of 186000 miles per second.

    1728 is 281 years ago.
    Plug this in to the formula:
    speed of light in 1728 according to new theory = 1.6 times the speed it is today.

    This doesn't fit the observations.

    As the creationist theory does not fit the observed facts, it must, according to the scientific method, be rejected.

    Science doesn't stop you from *believing* in this theory if you want to. It just doesn't fit the facts.

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  • by AbsolutValu on August 3rd, 2009

    AbsolutValu

    Creationists don't believe in math.

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