nhật kế
Definition
- Noun:
- Heliometer: A scientific instrument used for measuring small angular distances, originally designed for measuring the diameter of the sun.
- Sunshine recorder / Pyrheliometer: An instrument for measuring the intensity or energy of direct sunlight at a given location.
Usage Examples
- Noun:
- Nhà khoa học sử dụng nhật kế để đo cường độ bức xạ mặt trời. (The scientist uses a heliometer to measure solar radiation intensity.)
- Số liệu từ nhật kế rất quan trọng cho nghiên cứu khí hậu. (Data from the sunshine recorder is very important for climate research.)
Advanced Usage
- The term "nhật kế" is a specialized technical term used primarily in meteorology, climatology, and astronomy. It is not used in everyday conversation.
Variants and Related Words
- Máy đo ánh sáng mặt trời: A more descriptive phrase meaning "solar light measuring instrument."
- Nhiệt kế (n): Thermometer (an instrument for measuring temperature, often confused due to similar sound).
Synonyms
- Heliometer: An instrument for measuring the sun's diameter or angular separation of stars.
- Pyrheliometer: An instrument that measures direct solar irradiance.
- Sunshine recorder: An instrument that records the duration of sunshine.
Notes on Meaning
- The primary meaning in modern Vietnamese, especially in meteorological contexts, aligns with sunshine recorder or pyrheliometer.
- The historical and astronomical meaning refers to the heliometer, used for precise angular measurements of celestial bodies.