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How light energy is used to make ATP and NADPH. Photosystems I and II. Reaction center chlorophylls P700 and P680.
Understanding the properties of electromagnetic waves and the electromagnetic spectrum.
To the right of the visible spectrum, we find the types of energy that are lower in frequency (and thus longer in wavelength) than visible light. These types of energy include infrared (IR) rays (heat waves given off by thermal bodies), microwaves, and radio waves.
Light energy is a form of radiant energy. Radiant energy refers to the entire spectrum of electromagnetic waves while light energy refers to the Visible Light of the spectrum.
Here, we’ll consider light as a form of energy, and we'll also see how pigments – such as the chlorophylls that make plants green – absorb that energy. What is light energy? Light is a form of electromagnetic radiation, a type of energy that travels in waves.
During the light-dependent reactions of photosynthesis, light energy excites electrons, which then move through a series of molecules in the thylakoid membrane of chloroplasts. As the electrons move to lower energy states, they help pump hydrogen ions into the thylakoid lumen, creating a concentration gradient.
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Course: Middle school biology > Unit 3. Lesson 1: Photosynthesis in organisms. Photosynthesis in organisms. Photosynthesis in organisms. Understand: photosynthesis in organisms. Apply: photosynthesis in organisms.
Did you know that energy exists in a variety of forms and can be transferred from one object to another? Here, you'll learn about kinetic and potential energy, how objects can gain or lose energy, and will explore some examples of energy transfer that we see in our everyday lives.
Learn about mechanical waves and light in this Khan Academy lesson.