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A particular sensitizer can absorb photons of one wavelength and release photons of a longer wavelength Why must the radiation be at a longer wavelength?
Wiki User
∙ 10y ago
First, consider the relationship between wavelength and energy and reformulate the premise in terms of energy. Then, study fluorescence, the process in which a molecule absorbs a photon and releases a subsequent photon at a longer wavelength.
In fluorescence, energy must be conserved. The total energy absorbed must be equal to the total energy released by the excited molecule (sensitizer). The question is asking, for example, if a sensitizer absorbs a photon with energy of 3 eV and releases a photon of 2.5 eV, where did the missing 0.5 eV go?
This question comes directly from the laboratory manual for the introductory chemistry courses at the University of Alabama. For those students attempting to find an easy answer without putting forth any effort, i.e. cheat, you'll have to look elsewhere.
- Mr. E.
Wiki User
∙ 10y ago
Gavin White
Dominik Konwinski
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A photon of wavelength 3000 A is absorbed by a gas and remitted as two photons One of the photons is red 7600 A What is the wavelength of the other photon?
Use the equations E=hf and v=fλ to get your answer
Which colour has the shortest wavelength?
Shortest wavelength means the highest frequency, meaning the photons have the highest energy. That is color violet. The violet light colors the skin brown. Red light with lower energy photons cannot do that.
How do you calculate the number of photons that corresponds to 600 nm of light?
λ - wavelength (NM) c - speed of light (3x108 m/s)= 162 000 nmf - Frequency (Hz)λ = c \ f600=162 000 nm\ f f=270 Hz
If a photons wavelength is 663 nm what is its energy?
E = hc/wavelength where E is energy; h is planks constant and wavelength is 663 nm=6.63x10^-7 mE = (6.626x10-34 Jsec)(3x10^8 m/sec)/6.63x10^-7 m E = 2.998x10^-19 J
Does gamma radiation have no mass?
No Gamma Rays do not have mass. All electromagnetic radiation has no mass.
Why are the photons that emerge from the Sun's surface visible-light photons and infrared-light photons rather than gamma-ray photons?
Photons do not come in different types like infared-photons etc. they are just the wavelength that the photons are at and nuclear fusion just happens to emit photons at a particular wavelength
Why is radiation with shortest wavelength the most powerful?
In our Universe, EM radiation can only come in discrete chunks called "photons." The energy of each individual photon depends on the frequency of the EM radiation. Frequency depends on wavelength (or vice-versa): the shorter the wavelength, the higher the frequency. Thus, short wavelength photons have more energy. That's just how our Universe operates, whether or not we like it.
Do hotter objects emit photons with a shorter wavelength?
Yes, according to the laws of thermal radiation.
What does fluoresce mean?
Fluorescent means something is glowing, usually with visible light. Fluorescent means giving off visible (or invisible) radiation as a result of absorbing shorter wavelength radiation.
What is the numbers of photons of light with a wavelength of 4000 pm that provide 1 j of energy?
If a certain source emits radiation of a wavelength of 400 nm then the energy in a mole of photons of this radiation can be found using E = hc/w. The energy in kJ/mol of a mole of these photons is approximately 300 kJ / mole.
Photons with the highest energy have?
highest frequency / shortest wavelength / same speed as all other photons.
Which are more energetic photons of UV A radiation or photons of UV B radiation?
UVB
What is the longest wavelength photon?
There is no longest wavelength for photons. It can be arbitrarily long.
Which are more energetic photons of UV-A radiation or photons of UV-B radiation?
UV-B.
The color of light is determined by its?
Wavelength, or alternatively its frequency.
How does the amount of energy in the light changes as the wavelength increases?
The energy of the photons decreases as the wavelength increases
How does a plant frow in artificial lighting?
Same way it grows in sunlight. Photons of light at the right wavelength impact the pigment chlorophyll, excite and electron from the pigment which then enters photosystem II. Photons of the correct wave length are photons of the correct wavelength and the plant does not care what the source is of these photons.
