NSES Content Standard B
Physical Science: Light, heat, electricity, and magnetism Grades K-4, page 127 Light travels in a straight line until it strikes an object. Light can
be reflected by a mirror, refracted by a lens, or absorbed by the object.
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Benchmark 4F The Physical Setting: Motion
Grades 9-12, page 92
Waves can superpose on one another, bend around corners, reflect off
surfaces, be absorbed by materials they enter, and change direction when
entering a new material. All these effects vary with wavelength. The energy
of waves (like any form of energy) can be changed into other forms of energy.