Wavelength

Definition

Wavelength is the distance between two consecutive peaks or troughs in a wave. It is a crucial property of light waves that determines their energy and color.

5 Must Know Facts For Your Next Test

1. Wavelength is inversely proportional to the energy of the light; shorter wavelengths have higher energy.
2. Visible light used in photosynthesis ranges from approximately 400 to 700 nanometers.
3. Chlorophyll pigments absorb light most efficiently at specific wavelengths, particularly blue (around 450 nm) and red (around 680 nm).
4. The absorption spectrum of chlorophyll shows which wavelengths are absorbed for photosynthesis.
5. Different pigments in the chloroplast absorb different wavelengths, broadening the range of light that can be used for photosynthesis.

Review Questions

• What is the relationship between wavelength and energy?
• Which wavelengths of visible light are most effectively absorbed by chlorophyll during photosynthesis?
• How does wavelength affect the efficiency of photosynthesis?

Related terms

Photon: A particle representing a quantum of light, carrying energy proportional to its wavelength.

Absorption Spectrum: A graph showing the specific wavelengths of light absorbed by a pigment.

Chlorophyll: The primary pigment involved in photosynthesis, absorbing mainly blue and red light.