第15章光Light原書 p.473–494

• The electromagnetic spectrum is made up of a broad range of frequencies of electromagnetic radiation.• All frequencies of EM radiation travel at the same speed in a vacuum and consist of an electric field and a magnetic field. The types of EM radiation have different frequencies and wavelengths, and different energies and penetrating ability.

・電磁スペクトルは、電磁放射の幅広い振動数の範囲からなる。・電磁放射はどの振動数でも真空中を同じ速さで進み、電場と磁場からなる。電磁放射の種類ごとに振動数と波長が違い、エネルギーと物を通り抜ける力も違う。