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Why does planck curve decline after reaching the peak wavelength?
Wiki User
∙ 13y ago
A blackbody can only emit a finite amount of power, so the curve better decline. In other words the integral from nu = 0 to nu=positive infinity had better be finite.
Wiki User
∙ 13y ago
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A blackbody curve relates the wavelength of emitted light to?
The temperature of the object.
During which phase of the bacterial growth curve does the total number of viable cells decline?
dead phase
Why do you use the wavelength with the maximum absorbance in spectroscopy?
Short answer:Using the maximum wavelength gives us the best results. This is because at the peak absorbance, the absobance strength of light will be at the highest and rate of change in absorbance with wavelength will be the smallest. Measurements made at the peak absorbance will have the smallest error.Long answer: It really depends on what is the largest source of error. Taking the readings at the peak maximum is best at low absorbance, because it gives the best signal-to-noise ratio, which improves the precision of measurement. If the dominant source of noise is photon noise, the precision of absorbance measurement is theoretically best when the absorbance is near 1.0. So if the peak absorbance is below 1.0, then using the peak wavelength is best, but if the peak absorbance is well above 1.0, you might be better off using another wavelength where the absorbance is closer to 1. Another issue is calibration curve non-linearity, which can result in curve-fitting errors. The non-linearity caused by polychromatic light is minimized if you take readings at either a peak maximum or a minimum, because the absorbance change with wavelength is the smallest at those wavelengths. On the other hand, using the maximum increases the calibration curve non-linearity caused by stray light. Very high absorbances cause two problems: the precision of measurement is poor because the transmitted intensity is so low, and the calibration curve linearity is poor due to stray light. The effect of stray light can be reduced by taking the readings at awavelength where the absorbance is lower or by using a non-linear calibration curve fitting technique. Finally, if spectral interferences are a problem, the best measurement wavelength may be the one that minimizes the relative contribution of spectral interferences (which may or may not be the peak maximum). In any case, don't forget: whatever wavelength you use, you have to use the exact same wavelength for all the standards and samples. See http://terpconnect.umd.edu/~toh/models/BeersLaw.htmlTom O'HaverProfessor Emeritus
Are latitude and longitude lines curve or straight?
They curve with the curve of the Earth.
When the diameter of the cylinder increases what happens to the curve of the meniscus?
The curve flattens out :)
Why does the plank cuve drop below the rayleigh-jeans curve?
The RJ Law assumes that the amount of energy of being given off as electro-magnetic radiation for a specific wavelength depended on how many vibrations at that wavelength would be permitted within a cavity. Kind of like permitted harmonics on a vibrating string. The RJ Law worked fine for explaining the amount of energy given off by long wavelength EM radiation, but it utterly failed to explain why there was a cut-off for short wavelength EM radiation. Max Planck came upon the solution to this, but Planck himself thought it was only a mathematical oddity. It was only later that scientists concluded that his solution -- that light comes in discrete chunks of energy -- was a reality and not a trick of math. If you make Planck's assumption and apply the results rigorously, you find that, eventually, the emission of shorter wavelength (ie, higher frequency) light requires too much energy to occur.
A blackbody curve relates the wavelength of emitted light to?
The temperature of the object.
What was Planck's contribution to the atomic theory?
Planck created the Planck's curve. All objects emit energy in the shape of the curve, where the amount and the peak energy vary only as the temperature of the body. It contradicted atomic theory because it showed that photos should gamin more energy from atoms than they lose. It had an immediate impact on stellar astronomy, the brightness and color of the stars determine its energy production and temperature.
What does toe forgetting curve refer to?
The forgetting curve illustrates the decline of memory retention over time. See http://en.wikipedia.org/wiki/Forgetting_curve for more information.
During which phase of the bacterial growth curve does the total number of viable cells decline?
dead phase
What three things could cause the demand curve to shift to the left?
When income of the consumer decline demand curve shift left to downward.Assumption:income .population.taste .habbit.whether.expected future price.
What happens to the aggregate expenditures curve when autonomous expenditures fall?
Aggregate expenditures will shifts down by the decline in aggregate expenditures.
Describe the three different kinds of survivorship curves and the information that can be obtained from them.?
type 1 curve is a more common curve for large mammals like humans where individuals mostly die later in lifetype 2 is a curve that affects small mammals like birds, insects, and reptiles that has a uniform rate of decline for lifetype 3 has a very high birth and mortality rate which makes a huge decline in the young population
As the wavelength decreases what happens to wave diffraction?
As wavelength decreases the wave diffraction will decrease, so the curve formed will be less noticeable. The sharpness of the diffraction will decrease that you can see will lessen.
Which range of the aggregate supply curve is characterized by slack in the economy?
This would be the Keynesian range. This will only happen if the economy is reaching a type of slack.
Will economic growth necessarily involve a parallel outward shift of the production possibility curve?
Any time the PPC curve shifts outward it indicates economic growth, however reaching a point outside of an PPC can be reached by using trade.
Can anyone make a perfect circle?
According to Planck's Law, it is impossible to create a perfect circle (2D plane), let alone a perfect sphere (3D plane). Planck's measurement is 10^-44Hz (sine curve), or the distance light travels in a second. Also, the value of Pi forbids any perfect measurement for the circumference, because the value never ends, no matter how close you get.
