Use mathematical representations to describe a simple model for waves that includes how the amplitude of a wave is related to the energy in a wave.

  1. Physics

    Strange X-rays point to possible ‘dark’ matter

    Scientists have been looking for “dark” matter. It’s supposed to make up most of the universe — but it’s also invisible. X-rays may now point to where some of this weird stuff is.

  2. Physics

    Explainer: How heat moves

    Energy moves through the universe one of three ways: conduction, convection and radiation. Only radiation can occur through empty space.

  3. Physics

    Spinning black holes may ‘sing’ during a collision

    The massive black hole in the movie Interstellar would create a unique gravity-wave signal when gobbling a smaller partner.

  4. Health & Medicine

    Headed to a concert this summer? Pack earplugs

    Wearing earplugs at concerts and other loud events may prevent hearing loss and permanent ear damage, a new study suggests.

  5. Health & Medicine

    Explainer: When loud becomes dangerous

    Many people don’t realize that sounds — even those of the music they love — can prove harmful when they get too loud.

  6. Physics

    Scientists Say: Wavelength

    When something travels as a wave — such as light — scientists can measure it by its wavelength, the distances between the peaks.

  7. Physics

    Scientists Say: Watt

    Say Watt? This is a unit used to measure the flow of energy being used.

  8. Physics

    Gravity waves detected at last!

    Albert Einstein predicted gravitational waves 100 years ago. Now scientists have detected them coming from the collision of two black holes.

  9. Physics

    Explainer: What are gravitational waves?

    Albert Einstein had predicted that large catastrophes, like colliding black holes, should produce tiny ripples in the fabric of space. In 2016, scientists reported finally detecting them

  10. Physics

    How to catch a gravity wave

    Physicists have just announced finding gravity waves. The phenomenon was predicted a century ago by Einstein’s theory of general relativity. Here’s what it took to detect the waves.