電磁波

• Reading: でんじは
• Romaji: denjiha
• Kanji breakdown: 電 (den) — electricity; 磁 (ji) — magnetism; 波 (ha) — wave
• Pronunciation: /deɴ.dʑi.ha/

Meaning

Electromagnetic wave. Energy that travels through space in the form of oscillating electric and magnetic fields.

A noun used in physics and everyday health discussions. Covers the entire electromagnetic spectrum from radio waves to gamma rays, including visible light. In daily conversation, often used in the context of concerns about radiation from electronic devices. Common collocations include 電磁波の影響 (denjiha no eikyou, effects of electromagnetic waves) and 電磁波過敏症 (denjiha kabinshou, electromagnetic hypersensitivity).

Examples

1. 電磁波にはさまざまな種類があり、光もその一つだ。 There are many types of electromagnetic waves, and light is one of them.
2. スマートフォンから出る電磁波の影響を心配する人がいる。 Some people worry about the effects of electromagnetic waves emitted by smartphones.
3. 電磁波を利用して離れた場所に情報を送ることができる。 Electromagnetic waves can be used to transmit information over long distances.

Usage Guide

Context: physics, technology, health

Tone: neutral

Origin & History

From Sino-Japanese: 電磁 (denji, electromagnetic) + 波 (ha, wave). 電 (den, electricity) + 磁 (ji, magnetism) + 波 (ha, wave). Coined to describe waves predicted by Maxwell's equations.

Cultural Context

Era: Modern

Generation: All ages

Social background: Universal