Ключевые слова: amplitude, background, blue, color, curve, danger, different, digital, education, electromagnetic, electronic, energy, frequency, gamma, hertz, infographic, infrared, invisible, ir, light, lightbulb, magnetic, nanometer, optical, oscillation, physics, prism, radar, radiation, radio, radioactive, rainbow, ray, rays, red, refraction, remote, science, signal, sound, spectrum, sun, technology, temperature, ultraviolet, uv, visible, warning, wave, x ray,