Definition

1. Noun:
   • Fluorescence: A physical phenomenon where certain substances emit visible light when exposed to ultraviolet light or X-rays. The emitted light typically stops shortly after the exciting radiation is removed.

Usage Examples

• Noun:
  • Hiện tượng huỳnh quang được ứng dụng trong nhiều lĩnh vực khoa học. (The phenomenon of fluorescence is applied in many scientific fields.)
  • Ánh sáng huỳnh quang của chất này có màu xanh lục. (The fluorescent light of this substance is green.)
  • Họ nghiên cứu cường độ huỳnh quang của mẫu vật. (They study the fluorescence intensity of the specimen.)

Advanced Usage

• "Phát huỳnh quang" / "Có tính huỳnh quang": To fluoresce / To be fluorescent.
  • Một số khoáng chất phát huỳnh quang dưới tia cực tím. (Some minerals fluoresce under ultraviolet light.)
• "Huỳnh quang hữu cơ": Organic fluorescence.
  • Huỳnh quang hữu cơ là chủ đề nghiên cứu quan trọng. (Organic fluorescence is an important research topic.)

Variants and Related Words

• Huỳnh quang hóa (n): Fluoroscopy (a technique for obtaining real-time moving images using X-rays and a fluorescent screen).
• Vật liệu huỳnh quang (n): Fluorescent material.
• Chất huỳnh quang (n): Fluorescent substance/fluorophore.
• Đèn huỳnh quang (n): Fluorescent lamp (a compound term where 'huỳnh quang' describes the type of lamp).

Synonyms

• Sự phát quang: Luminescence (a broader term that includes fluorescence and phosphorescence).
• Sự lân quang: Phosphorescence (a related phenomenon where light emission continues for a time after the excitation stops).

Related Phrases

• Kính hiển vi huỳnh quang: Fluorescence microscope.
• Phổ huỳnh quang: Fluorescence spectrum.
• Bước sóng kích thích huỳnh quang: Fluorescence excitation wavelength.

Notes on Meaning

• Huỳnh quang specifically refers to the physical phenomenon or property itself. It is not typically used as a verb in Vietnamese; the verb form is expressed with "phát huỳnh quang".
• It is distinct from "lân quang" (phosphorescence), which involves delayed light emission.
• In everyday language, it is most commonly encountered in the compound term "đèn huỳnh quang" (fluorescent lamp).

noun

1. flourescence