HS-PS4-4

Evaluate the validity and reliability of claims in published materials of the effects that different frequencies of electromagnetic radiation have when absorbed by matter.

  1. Physics

    Filter lets in only the right light

    Scientists have built a light filter that only permits light coming from one desired angle to pass through. Built from alternating layers of transparent materials, it could help minimize the glare in telescopes and cameras or boost the efficiency of solar cells.

    By Stephen Ornes

  2. Kids’ ingenuity honored at Intel ISEF

    Young scientists receive awards in international competition.

    By Laura Sanders
  3. Physics

    Explainer: What is a laser?

    Lasers are the brightest source of light on Earth and produce the purest form of color possible.

    By Amanda Leigh Mascarelli
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