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- Low absorbance means that the plant is reflecting that light back. Both chlorophyll a and b absorb blue and red light wavelengths and reflect green. Chlorophyll a has a peak in the violet and red regions and chlorophyll b in the blue and orange regions.
open.lib.umn.edu/horticulture/chapter/11-2-light-and-photosynthesis/
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The chloroplasts in leaves contain light-absorbing pigments and these capture different wavelengths of light. Blue light stimulates growth, while red light is important for flower production, and both are absorbed by the green pigment chlorophyll.
- Specular Reflection
- Concave Mirrors
- Convex Mirrors
- Scattering of Light
The angle at which light hits a reflecting surface is called the angle of incidence, and the angle at which light bounces off a reflecting surface is called the angle of reflection If you want to measure these angles, imagine a perfectly straight line at a right angle to the reflective surface (this imaginary line is called ‘normal’). If you measur...
The inside curve of a spoon is an example of a concave mirror Concave mirrors are used in certain types of astronomical telescopes called reflecting telescopes. The mirrors condense lots of light from faint sources in space onto a much smaller viewing area and allow the viewer to see far away objects and events in space that would be invisible to t...
Convex mirrors curve outwards, like the outside of a balloon. Parallel rays of light strike the mirror and are reflected outwards. If imaginary lines are traced back, they appear to come from a focal point behind the mirror. Convex mirrors are useful for shop security and rear-view mirrors on vehicles because they give a wider field of vision.
Some light is scattered in all directions when it hits very small particles such as gas molecules or much larger particles such as dust or droplets of water. The amount of scattering depends on how big the particle is compared to the wavelength of light that is hitting it. Smaller wavelengths are scattered more. “Why is the sky blue?” is a common q...
How plants respond to light. Most plants grow and bend towards the light, especially sun-loving species. The ability of plants to grow towards a light source is called phototropism (from the Greek photo, meaning light, and tropos meaning turn).
Jul 26, 2022 · High absorbance at a particular wavelength means that pigment is collecting that light at that wavelength to harvest energy. Low absorbance means that the plant is reflecting that light back. Both chlorophyll a and b absorb blue and red light wavelengths and reflect green.
Jul 31, 2022 · Phototropism—the directional bending of a plant toward or away from a light source—is a response to blue wavelengths of light. Positive phototropism is growth towards a light source (Figure 2), while negative phototropism (also called skototropism) is growth away from light.
Schlau-Cohen fires lasers at the proteins and uses special microscopes to understand how they interact with light—how they absorb it, what happens to the light as it moves around inside the proteins, and how some of it gets converted into heat.
Photosynthesis takes place in two sequential stages: the light-dependent reactions and the light independent-reactions (Calvin cycle). In the light-dependent reactions, energy from sunlight is absorbed by chlorophyll and that energy is converted into stored chemical energy. Light-dependent reactions require water and produce oxygen and energy ...
