We saw in the explanation for why the sky is blue that different
wavelengths or
frequencies of light correspond to different
colours of light. The table below gives the wavelengths and colours of light in the visible spectrum:
Colour
Wavelength range (nm)
violet
390 - 455
blue
455 - 492
green
492 - 577
yellow
577 - 597
orange
597 - 622
red
622 - 780
Colours and wavelengths of light in the visible spectrum.
We also know that the energy of a photon of light can be found from:
Therefore if we know the frequency or wavelength of light, we can calculate the photon's energy and vice versa.
Investigation : frequency, wavelength and energy relation
Refer to
[link] : Copy the table into your workbook and add two additional columns.
In the first new column write down the lower and upper frequencies for each colour of light.
In the second column write down the energy range (in Joules) for each colour of light.
Questions
Which colour of visible light has the highest energy photons?
Which colour of visible light has the lowest energy photons?
Discharge lamps (sometimes incorrectly called neon lights) use the spectra of various elements to produce lights of many colours.
run demo
A photon of wavelength 500 nm is emitted by a traffic light.
We are given
and we need to find the photon's
energy ,
frequency and
colour .
The energy of the photon is
J.
The frequency of the photon is
.
The wavelength given in the question is 500 nm. We can see in the table that green light has wavelengths between 492 - 577 nm. Therefore 500 nm is in this range so the colour of the light is
green .
I have some sources which emit light of the following wavelengths:
400 nm,
580 nm,
650 nm,
300 nm.
What are the colours of light emitted by the sources (see
[link] )? Which source emits photons with the highest energy and which with the lowest energy?
Four wavelengths of light are given and we need to find their
colours .
We also need to find which colour photon has the highest energy and which one has the lowest energy.
400 nm falls into the range for
violet light (390 - 455 nm).
580 nm falls into the range for
yellow light (577 - 597 nm).
650 nm falls into the range for
red light (622 - 780 nm).
300 nm is not shown in the table. However, this wavelength is just a little shorter than the shortest wavelength in the violet range. Therefore 300 nm is
ultraviolet .
We know
For 400 nm:
For 580 nm:
For 650 nm:
For 300 nm:
Therefore, the photons with the highest energy are the
ultraviolet photons.
The photons with the lowest energy are from light which is
red .
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
When MP₁ becomes negative, TP start to decline.
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 •
Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 •
Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
Ezea
ok
Shukri
how do you save a country economic situation when it's falling apart
Economic growth as an increase in the production and consumption of goods and services within an economy.but
Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
production function means
Jabir
What do you think is more important to focus on when considering inequality ?
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
Awais
thank you so much 👍 sir
Asui
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has
The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50.
A,Calculate quantities of x and y which maximize utility.
B,Calculate value of Lagrange multiplier.
C,Calculate quantities of X and Y consumed with a given price.
D,alculate optimum level of output .
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product