物理学学生実験の再評価 : 光電効果を用いたプランク定数測定
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概要
- 論文の詳細を見る
The measurement of Planck's constant h by using the photoelectric effect is a subject which often appears in junior courses of physics experiments. Although the theory of the measurement shown in textbooks seems to be quite simple and clear, a commercially available device for the measurement provides systematically smaller values (〜3×10^<-34> Js) against the accepted one. This systematic error is ascribable to a tailing of the photocurrent as the reverse voltage is increased; owing to the tailing, it is difficult to determine at what point of the reverse voltage the photocurrent exactly vanishes. To understand this situation, a knowledge of the Fermi distribution at finite temperatures which the students will learn in the more advanced physics course is required. For this reason, the measurement of Planck's constant in this style is rather inadequate as a subject in the junior course.
- 高知大学の論文
- 1986-03-31