Explain light in cell metabolism, Biology

Assignment Help:

Explain Light in cell Metabolism?

Energy for almost all organisms on earth is derived directly or indirectly from light energy produced by the sun. Sunlight consists of energy packets called photons that travel in waves of various lengths.

Wavelength refers to the distance between the peak of one wave to the peak of the next wave. We see light as different colors depending upon the wavelength of the light our eyes receive. Light containing visible light of all wavelengths appears white. The shorter the wavelength of light, the more energy it has. The energetic ultraviolet rays are shorter than 400 nm; infrared rays are longer than 700 nm.

White light contains all of the wavelengths of light. When white light strikes an object, substances called pigments absorb certain wavelengths and reflect others. Objects appear the color of the reflected light. So, if an object appears to our eyes as red, the pigment in the object is absorbing all of the other colors (wavelengths) except red, and only red wavelengths are reflected to our eyes!

A graph of absorption measured against wavelength for a given pigment is called an absorption spectrum. An action spectrum is a graph of photosynthesis rates for different wavelengths of incident light for a given pigment.

 


Related Discussions:- Explain light in cell metabolism

How does phosphorus cycle vary from carbon cycle, (a) Trace the succession ...

(a) Trace the succession of plants on a dry bare rock. (b) How does phosphorus cycle vary from carbon cycle?

Mechanisms for pumping blood, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Stentless devices -biological valves, Stentless Devices : A bioprosthesis...

Stentless Devices : A bioprosthesis mounted on a stent reduces the effective orifice area (EOA). The newer version (third generation) stentless gluteraldehyde preserved porcine v

Explain defensive proteins, Explain Defensive Proteins These proteins p...

Explain Defensive Proteins These proteins protect against diseases. Antibodies are the example of defensive proteins. These  combat bacteria and viruses. Also, immunoglobulins,

Which is the type of nitrogen waste, Which is the type of nitrogen waste el...

Which is the type of nitrogen waste eliminated by beings of the class Reptilia? These beings excrete mainly uric acid. This substance is less toxic than ammonia and it can be k

Importance of biodiversity, T hese are some important uses of biodiversity....

T hese are some important uses of biodiversity. 1.   Source of food, medicines and drugs: (a)       Wheat, rice and maize are three carbohydrate rich crops and contribute

Secondary and tertiary consumers - biotic components, Secondary and Tertiar...

Secondary and Tertiary Consumers - Biotic Components Besides there are animals which depend on herbivores for food and are called secondary consumers. Since secondary consumer

Why do leaves change color, Why do leaves change color? Leave is the fo...

Why do leaves change color? Leave is the food factories of plants. During the spring and summer, leaves are actively making food and they are filled with chlorophyll, which giv

Name the implant failures, Implant failures On the basis of the stage w...

Implant failures On the basis of the stage when problems occurs implant failures can be classified as : i) Before Abutment Connection. ii) During Abutment Connection.

How does the contraceptive diaphragm work, How does the contraceptive diaph...

How does the contraceptive diaphragm work? What are the limitations of this contraceptive method? The contraceptive diaphragm is an artifact made of latex or plastic that when

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd