Skip to main content

So it turns out the speed of light might not be constant after all Comments

So, it seems the speed of light isn't quite constant after all. Two new studies published in the European Physical Journal D suggests that the speed of light in space isn't quite constant after all. The understanding is that space is not quite the perfect vacuum which it is often assumed to be. Continue Reading

1 - 10 of 36 Comments

  1. Sachin
    1 year ago

    Physics is based on approximation at a very small scale to accurately predict phenomena upto very large extent after which the effect will not be significant enough to be noticed. speed of light is constant in absolute vacuum which our space is very very very very near to. Therefore this is not a very strong argument against physics.

  2. Jerry N
    1 year ago

    PAUL W STAMP: "The headline of this article is intentionally misleading. "

    Author Marshall Connolly's calling card on Catholic On-Line seems to be writing provocative, psuedo-scientific titles for articles that contain misleading or no facts, and seldom, if ever, present any credible science to support the taunting headline. To his credit, however, his articles do seem to generate many comments here, including from me, so apparently someone being consistently misleading or wrong can make an entertaining read. If it brings more people to peruse some of the more serious Catholic On-line articles, then I'm all for him continuing with his current, albeit flabbergasting, MO.

  3. John
    1 year ago

    This article tells us nothing that hasn't been common knowledge for at least 100 years. The author should be embarrassed and either remove the article or completely rewrite it so it actually reflects new findings of the study.

  4. Wayne
    1 year ago

    More absolute proof that god exist. At this point only the mentally weak could ever ignore the evidence of God's Holy Light in our world!

  5. James Grant
    1 year ago

    It is already well understood and universally published that light travels slower through a medium than through a perfect vacuum. The textbooks are not lacking. This is not news.

  6. Tom C Chamberlain
    1 year ago

    This article seems to be more about an observation of the behavior of light in space than an observation of the behavior of light.

  7. Jim
    1 year ago

    So it turns out this article might not be news after all.

  8. PAUL W STAMP
    1 year ago

    The headline of this article is intentionally misleading. The speed of light IS constant in a perfect vacuum. The real nature of this article is that space isn't a perfect vacuum--but this changes nothing regarding the constant c. It would be more accurate to state in the headline that space is not a perfect vacuum, and that the speed of light traveling through space may not be constant. Big difference.

  9. Kyle
    1 year ago

    This should be titled, "Space may not be a vacuum." The speed of light, which is essential for the theory of relativity, changes in different mediums. People know that. That space may not be a perfect vacuum, or how vacuous it is does not mean that the speed of light is not constant, which I will still assume that it is.

  10. Brandon
    1 year ago

    Please revise your title to "So it turns out the speed of light, in space, might not be constant after all"

    The speed of light is still constant in a vacuum.


Leave a Comment

Comments submitted must be civil, remain on-topic and not violate any laws including copyright. We reserve the right to delete any comments which are abusive, inappropriate or not constructive to the discussion.

Though we invite robust discussion, we reserve the right to not publish any comment which denigrates the human person, undermines marriage and the family, or advocates for positions which openly oppose the teaching of the Catholic Church.

This is a supervised forum and the Editors of Catholic Online retain the right to direct it.

We also reserve the right to block any commenter for repeated violations. Your email address is required to post, but it will not be published on the site.

We ask that you NOT post your comment more than once. Catholic Online is growing and our ability to review all comments sometimes results in a delay in their publication.

Send me important information from Catholic Online and it's partners. See Sample

Post Comment


Newsletter Sign Up

Daily Readings

Reading 1, First Corinthians 2:10-16
to us, though, God has given revelation through the Spirit, for ... Read More

Psalm, Psalms 145:8-9, 10-11, 12-13, 13-14
Yahweh is tenderness and pity, slow to anger, full of faithful ... Read More

Gospel, Luke 4:31-37
He went down to Capernaum, a town in Galilee, and taught them ... Read More

Saint of the Day

September 2 Saint of the Day

St. Ingrid of Sweden
September 2: Born in Skänninge, Sweden, in the 13th century, St. Ingrid lived ... Read More