Home | | Botany 11th std | Spectrum of ­Electromagnetic Radiation

Chapter: 11th Botany : Chapter 13 : Photosynthesis

Spectrum of ­Electromagnetic Radiation

In the total electromagnetic spectrum,visible light is the smallest part.

Spectrum of ­Electromagnetic Radiation

In the total electromagnetic spectrum,visible light is the smallest part. The entire life on earth depends on light and is the driving force for all organisms. Plants have natural potential to utilize solar energy directly. In the given picture electromagnetic radiation spectrum and components of visible spectrum are mentioned. The wavelength of solar radiation which reaches the earth is between 300 to 2600 nm. The visible spectrum ranges between 390 to 763 nm (3900 Å to 7630 Å). The colour of the light is determined by the wavelength. Energy of the quantum is inversely proportional to wavelength. 

Shorter wavelength has more energy than longer wavelength. Electromagnetic spectrum consists of 8 types of radiations such as cosmic rays, gamma rays, X rays, U-V rays, Visible light spectrum, infrared rays, electric rays and radio rays (Figure 13. 5).



 

Properties of Light

 

1)          Light is a transverse electromagnetic wave.

 

2)          It consists of oscillating electric and magnetic fields that are perpendicular to each other and perpendicular to the direction of propagation of the light.

 

3)          Light moves at a speed of 3 × 108 ms–1

 

4)          Wavelength is the distance between successive crests of the wave.

 

5)          Light as a particle is called photon. Each photon contains an amount of energy known as quantum.

 

6)          The energy of a photon depends on the frequency of the light (Figure 13. 6).

 



 

Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail
11th Botany : Chapter 13 : Photosynthesis : Spectrum of ­Electromagnetic Radiation |

Related Topics

11th Botany : Chapter 13 : Photosynthesis


Privacy Policy, Terms and Conditions, DMCA Policy and Compliant

Copyright © 2018-2023 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.