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

Poising capacity of food, As redox conditions change, there will be some re...

As redox conditions change, there will be some resistance to change in a food's redox potential. This is known as poising capacity of food. This capacity is dependent on the concen

Blood supply of the heart, The heart is supplied exclusively by the right a...

The heart is supplied exclusively by the right and left coronary arteries. The coronary arteries are functional end arteries. There is no effective anastamosis between right and le

Echocardiography, Echocardiographic evaluation should be performed in all p...

Echocardiographic evaluation should be performed in all patients with clinically suspected IE, including those with negative blood cultures.  Not only is TEE the preferred approach

Evolution , What benefits led to natural selection of a two-circuit pump f...

What benefits led to natural selection of a two-circuit pump function of the heart a) One circuit to go from the heart to the body and one from the heart to the lungs b) One cir

What are benefits of increasing the growth of bifidobacteria, What are the ...

What are the benefits of increasing the growth of bifidobacteria? Bifidobacteria displaces potential pathogens selectively, showing an antibiotic like effect, which is unrelate

Physical concepts of plant water relation - diffusion, Physical Concepts of...

Physical Concepts of Plant Water Relation - Diffusion Diffusion is a spontaneous process that leads to net movement of a substance from a region of higher concentration to a r

Ground water, Ground Water Ground water represents a major subterranean...

Ground Water Ground water represents a major subterranean reservoir of fresh water. In general. it is not tapped by plants as it is too deep and does not suffer from loss due t

What are the male pronucleus and the female pronucleus, Q. What are the mal...

Q. What are the male pronucleus and the female pronucleus? The female pronucleus is the proper haploid nucleus of the egg cell and Male pronucleus is the haploid nucleus of the

Calculate the ph - microbial survival and growth, Calculate the pH - microb...

Calculate the pH - microbial survival and growth? Presence of microorganisms also depends on the pH of the medium. Most bacteria grow optimally near neutral pH (optimum 6.5 - 7

Drinking & driving, DRINKING & DRIVING - It should not be mixed because...

DRINKING & DRIVING - It should not be mixed because alcohol - 1.       Impairs ability to judge distances. 2.       Reduces capacity to coordinate limb muscles. 3.

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