Measurement of light intensity, Biology

Assignment Help:

Measurement of Light Intensity

How do we measure the intensity of a source of light falling on a surface? You know that light spreads out uniformly in all directions from a source. The amount of light shining on a unit area decreases with increasing distance, This decrease is equal to the square of the distance away from the source. Figure shown below shows how the intensity of light decreases with distance from the source.

26_measuer by light inten.jpg

Light intensity is measured in lux (metre candle). A lux is the amount of illumination shed on a square metre of cutved surface, one metre from a standard candle. Previously, the unlt foot candle (ftc) was used. A foot candle is the amount of illumination shed on a square foot of curved surface, one foot from a standard candle. To get an idealof the magnitude of footcandle, please read the accompanying margin remark.


Related Discussions:- Measurement of light intensity

Which of groups is not ionizable, Which of the following groups is NOT ioni...

Which of the following groups is NOT ionizable? Select one: a. Guanidinium b. Imidazole c. Phosphoryl d. Amine e. Aldehyde

Aves, Flighting adaptations in birds

Flighting adaptations in birds

Describe the mechanism responsible for the cessation, Describe a. the facto...

Describe a. the factors responsible for promoting lactation, and b. the mechanism responsible for the cessation of lactation when a mother weans her baby.

How is retaining wall works, How is retaining wall works? A retaining w...

How is retaining wall works? A retaining wall together with the backfill the wall retains and the soil that supports the wall is a highly indeterminate system. The magnitudes o

What is enteropathogenic escherichia coli, Escherichia coli is generally re...

Escherichia coli is generally regarded as part of the normal flora of the human intestinal tract and that of many animals. Serotypes of E. coli which have been implicated in human

Nursing management of myocarditis, Nursing Management Propped up po...

Nursing Management Propped up position.  Monitor signs and symptoms and laboratory test results documenting myocarditis.  Monitor adequacy of cardiac output and hemo

Describe about the term - bacterial infections, Describe about the term - B...

Describe about the term - Bacterial Infections Bacterium is a loose generic name for any microorganism (typically one celled) that has no chlorophyll and multiplies by simple d

Define prevention of iron deficiency, Define Prevention of Iron Deficiency?...

Define Prevention of Iron Deficiency? Iron deficiency anaemia accounts for approximately one-half or more of all the anaemia's seen worldwide. Iron deficiency without anaemia a

Explain poor growth - clinical signs of kwashiorkor, Explain Poor growth - ...

Explain Poor growth - clinical signs of kwashiorkor? Growth retardation is the earliest manifestation of kwashiorkor, the child will be lighter and shorter than its normal peer

Blood pressure, bloodpressure will be more in _ in than in_

bloodpressure will be more in _ in than in_

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