Fluorescence Concepts and Applications

The video explores the phenomenon of fluorescence, discovered through the mineral fluorite. It explains how fluorescence works, differentiating it from phosphorescence, and highlights its historical context and applications. Fluorescence is used in lighting, research, and medical diagnostics, with significant roles in spectroscopy and microscopy. Fluorite is crucial in technology, especially in lenses for scientific equipment.

What is the phenomenon called when teeth glow under a blacklight?

• Incandescence

• Bioluminescence

• Fluorescence

• Phosphorescence

What happens to electrons in fluorescent molecules when they absorb energy?

• They move closer to the nucleus

• They change color

• They become excited and move to a higher energy level

• They emit sound

How does the wavelength of emitted light in fluorescence compare to the absorbed light?

• It is shorter

• It is longer

• It is the same

• It is invisible

What is a key difference between fluorescence and phosphorescence?

• Phosphorescence lasts longer

• Fluorescence is only visible in the dark

• Phosphorescence requires sunlight

• Fluorescence lasts longer

Who was the first to name the phenomenon 'fluorescence'?

• Albert Einstein

• George Gabriel Stokes

• Isaac Newton

• Marie Curie

What is one of the most common uses of fluorescence in everyday technology?

• Solar panels

• Fluorescent lights

• LED screens

• Fiber optics

How is fluorescence used in medical diagnostics?

• To detect sound waves

• To measure blood pressure

• To track and label biological molecules

• To monitor heart rate

What is indocyanine green used for?

• In textile manufacturing

• As a food dye

• In solar panels

• In medical imaging

Why is fluorite used in lenses for fluorescence microscopy?

• It is cheaper than glass

• It changes color under light

• It is transparent to ultraviolet light

• It is more durable

What is a unique property of fluorite that makes it valuable in technology?

• It is a good conductor of electricity

• It is radioactive

• It is transparent to ultraviolet light

• It is magnetic