What is the name for the entire range of energy emitted from the sun? Define the

Question

What is the name for the entire range of energy emitted from the sun?

Define the term “photon”. What is a wavelength?

What portion of energy that is emitted from the sun is useful during photosynthesis?

Which pigment is the “key” pigment of photosynthesis? List two pigments which are considered “accessory”.

Which colors of light are absorbed the most during photosynthesis? Which are absorbed the least?

Which wavelengths (nm) are most effective for photosynthesis? Which wavelength (nm) is least effective?

How does the absorption spectrum different from the action spectrum?

Explanation / Answer

1) The term "radiation" simply denotes the fact that the energy travels as rays, that is, ... The entire region of electromagnetic energy distinguished by wavelength and . The range of electromagnetic energy emitted by the sun is known as the solar

2) Photon: Aparticle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass. b) Wave length: The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

3)The photosynthetic efficiency is the fraction of light energy converted into chemical ... In actuality, however, plants do not absorb all incoming sunlight (due to reflection, ... as heat (non-photochemical quenching), or emitted as chlorophyll fluorescence.

4) When a pigment absorbs light energy, either:
a. energy is dissipated as heat, or
b. energy is re-emitted immediately at a longer wavelength (fluorescence), or
c. "exciton" energy is passed from one molecule of chlorophyll to another in the photosynthetic antenna, and
d. an energetic electron is ejected by a pair of chlorophylls at the reaction center, initiating the electron transport chain that generates concentration gradients and the energy-storage molecules employed by the Calvin cycle to generate glucose and starch.

5) Chlorophyll absorbs all wavelengths of visible light except green, which it reflects, producing the green color of leaves. Various chlorophylls and accessory pigments have characteristic absorption spectra. The action spectrum of photosynthesis relates to the relative electron-exciting effectiveness of different wavelengths of light.

6) A pigment is any substance that absorbs light. The color of the pigment comes from the wavelengths of light reflected (in other words, those not absorbed). Chlorophyll, the green pigment common to all photosynthetic cells, absorbs all wavelengths of visible light except green, which it reflects to be detected by our eyes. Black pigments absorb all of the wavelengths that strike them. White pigments/lighter colors reflect all or almost all of the energy striking them. Pigments have their own characteristic absorption spectra.

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.