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Related Concept Videos

Light as Energy01:35

Light as Energy

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The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit...
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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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The Wave Nature of Light02:12

The Wave Nature of Light

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The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
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Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

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Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
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Photoluminescence: Applications01:14

Photoluminescence: Applications

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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Focusing of Light in the Eye01:16

Focusing of Light in the Eye

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Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
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Related Experiment Video

Updated: May 5, 2026

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
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Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

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Light People: Prof. Juejun Hu, exploring the light.

Tingting Sun1

  • 1Light Publishing Group, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dong Nanhu Road, Changchun, 130033, China. suntt@ciomp.ac.cn.

Light, Science & Applications
|August 27, 2024
PubMed
Summary
This summary is machine-generated.

Professor Juejun Hu is a leading expert in integrated photonics and optical materials. His research significantly impacts academia and industry, showcasing scientific innovation for future applications.

Related Experiment Videos

Last Updated: May 5, 2026

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films
08:38

Electrospray Deposition of Uniform Thickness Ge23Sb7S70 and As40S60 Chalcogenide Glass Films

Published on: August 19, 2016

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Area of Science:

  • Photonics
  • Optical Materials Science
  • Integrated Photonics

Background:

  • Professor Juejun Hu's academic journey began with top scores and progressed through prestigious institutions like Tsinghua University and MIT.
  • He has established himself as a leading authority in the fields of integrated photonics and optical materials.

Purpose of the Study:

  • This interview explores Professor Hu's research world and his insights into technological innovation.
  • The discussion aims to understand how scientific advancements drive future applications.

Main Methods:

  • The content is based on an interview format, delving into the expert's perspective.
  • Focuses on qualitative insights into research and innovation.

Main Results:

  • Professor Hu's work has significantly advanced the frontiers of integrated photonics and optical materials.
  • His research demonstrates substantial impact on industrial applications.

Conclusions:

  • Professor Hu's pioneering research exemplifies the transformative power of science in shaping the future.
  • His contributions highlight the synergy between academic discovery and industrial implementation.