About the author
Jim Lucas
Jim Lucas, Live Science Contributor

Jim Lucas is a contributing writer for Live Science. He covers physics, astronomy and engineering. Jim graduated from Missouri State University, where he earned a bachelor of science degree in physics with minors in astronomy and technical writing. After graduation he worked at Los Alamos National Laboratory as a network systems administrator, a technical writer-editor and a nuclear security specialist. In addition to writing, he edits scientific journal articles in a variety of topical areas.

  • What Are Centrifugal & Centripetal Forces?

    What Are Centrifugal & Centripetal Forces?

    May 10, 2019 | Reference

    These two closely related forces describe circular motion, but the meanings are often mixed up.
    Read More

  • What Are Radio Waves?

    What Are Radio Waves?

    February 27, 2019 | Reference

    Radio waves help us communicate across close and far distances. They also help us identify otherwise invisible objects in space.
    Read More

  • What Is Infrared?

    What Is Infrared?

    February 27, 2019 | Reference

    Infrared radiation plays a big role in our lives. It's what makes up half of the total energy released by the sun and it's what your TV remote shoots at the receiver when you're changing the channel.
    Read More

  • Electricity Basics: Resistance, Inductance and Capacitance

    Electricity Basics: Resistance, Inductance and Capacitance

    January 16, 2019 | Reference

    Resistors, inductors and capacitors are basic electrical components that make modern electronics possible.
    Read More

  • What Are Gamma-Rays?

    What Are Gamma-Rays?

    November 29, 2018 | Reference

    Gamma-rays are a form of electromagnetic radiation. They can be used to treat cancer, and gamma-ray bursts are studied by astronomers.
    Read More

  • What Are X-Rays?

    What Are X-Rays?

    October 05, 2018 | Reference

    X-rays are a form of electromagnetic radiation. One of the most common uses of X-rays is for medical imaging. X-rays are also used in treating cancer and in exploring the cosmos.
    Read More

  • What Are Microwaves?

    What Are Microwaves?

    February 08, 2018 | Reference

    Microwaves are a type of electromagnetic radiation, and are useful in communications, radar and cooking.
    Read More

  • 6 Simple Machines: Making Work Easier

    6 Simple Machines: Making Work Easier

    February 06, 2018 | Reference

    Humans have invented six devices that combine to make work easier. These six simple machines are the wheel and axle, the lever, the inclined plane, the pulley, the screw and the wedge.
    Read More

  • Newton's Laws of Motion

    Newton's Laws of Motion

    September 26, 2017 | Reference

    Newton's laws of motion formalize the description of the motion of massive bodies and how they interact.
    Read More

  • Inertia & Newton's First Law of Motion

    Inertia & Newton's First Law of Motion

    September 26, 2017 | Reference

    Newton's First Law of Motion states, "A body at rest will remain at rest, and a body in motion will remain in motion unless it is acted upon by an external force."
    Read More

    • 1 / 3
    • 2
    • 3
    • Next