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A pigment absorbs a photon only if the energy of the photon is?
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∙ 13y ago
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Could an atom emit one photon of blue light after absorbing only one photon of red light?
No, it could not. A blue photon carries more energy than a red photon, since the blue photon's frequency is higher. That means one red photon wouldn't deliver enough energy to the atom to give it the energy to emit a blue photon.
Does light transfer energy?
Yes, but only while they're moving. The photon has zero rest energy.
An electron moves from one orbital to another only when it absorbs or emits energy?
That's correct.
How does photon differ from inertial particle?
A photon is said to be "massless", meaning that it has no REST MASS (of course, having energy, it also has an equivalent mass).In a vacuum, a photon can ONLY move at the so-called speed of light (about 300,000 km/second). "Regular" particles can ONLY move at sub-light speed. They can get close to the speed of light, but never quite reach it.
Why do shorter wavelengths get absorbed into gas molecules rather than long wavelengths?
Answer:atoms comprise of tightly bound nucleus of protons and neutrons (protons have positive charge and neutrons are neutral). Electrons exists in pre-defined orbits around the nucleus and are negative particles. predefined means that they can only exist at certain distances. Because these distances are associated with a kind of energy, it means these electrons only exist at predefined energy levels. Now, if you give an electron not enough energy to reach the next energy level (by sending a photon near it), it cannot exist in-between therefore it will not absorb that energy, therefore it will be transmitted (or will pass through the atom), but if that light particle does have the right energy, then the electron will absorb it and it will jump up an energy level, hence that energy is absorbed and we say the gas is opaque to that frequency. After the absorption, the electron may jump down again and emit a photon, the frequency of which is dependant on the temperature of the substance in question (ever wonder why metal gets red hot??).the energy of a light photon is E=hf, where f= frequency and h is a constant, and of course E=energy.wavelength is inversely proportional to frequency, which means longer wavelength is less energy than shorter wavelength light.This means that a photon of energy E has a frequency of E/h, therefore you can see that the energy of a light photon is directly related to its frequency, and putting that together with what we know about electron only absorbing light photon energy of certain energy values, we can see why only certain wavelength of light gets absorbed.There are other things that can happen to photon that don't involve bound electrons too.
Why are photoautotrophs green?
Because they use a pigment called "chlorophyll" to gather energy from sunlight. Chlorophyll reflects only green light, and absorbs all other colors.
How do you calculate photon wavelength with only the energy of the photons?
Photon Energy E=hf = hc/w thus wavelength w= hc/E or the wavelength is hc divided by the energy of the photon or w= .2 e-24 Joule meter/Photon Energy.
Could an atom emit one photon of blue light after absorbing only one photon of red light?
No, it could not. A blue photon carries more energy than a red photon, since the blue photon's frequency is higher. That means one red photon wouldn't deliver enough energy to the atom to give it the energy to emit a blue photon.
When 10 electrons drop from fifth to second energy level?
Only one photon is produced per electron in any de-excitation. The number of energy levels it drops only determines the energy of the photon emitted.
Green pigment in plants that absorbs light energy?
Chlorophyll is the green pigment. There is a chlorophyll a and chlorophyll b that are found in green plants. The only difference between Chlorophyll a and b is in its structure. Chlorophyll a has a -CH3 group and b has a -CHO group instead. Also, Chlorophyll is anchored to thylakoid membranes located inside a chloroplast."Chlorophyll" is the green pigment that stores sun energy while the process is called "Photosynthesis"The green pigment that traps light energy from the sun is known as chlorophyll. It is found in plant cells and it uses this trapped energy in the process of photosynthesis.
What must an electron do to move from ground state to an excited state?
To move an electron from the ground state to an excited state, it requires an input of energy. It should be equal to the energy difference between the two levels. This energy comes from collision with other molecules and atoms.
Why does sodium vapor emit only certain frequencies of visible light?
It is because the electrons surrounding an atom, say sodium, can only exist at certain energy levels. When a photon (packet of light energy) hits an orbiting electron it only gives energy to that electron if the energy of the photon is exactly enough to move the electron to a higher energy level, if not it doesn't effect the electron. As the energy of a photon is directly proportional to the it wavelength, only certain wavelengths affect an atom's electrons. When they do effect the electrons the photon is absorbed, giving the absorption spectrum. Emission spectra are the reverse of this process, when an electron cascades back down to its lowest possible energy state after this photon interaction it gives out certain frequencies of light. The energy of this light will be equal to the energy absorbed, so the photons emitted will be equal to the photons absorbed which is why emission spectra look like the inverse of an absorption spectrum.
Is light emitted when an electron makes a transition to a lower energy level?
No, as energy is absorbed. When the reverse happens, the higher state to lower state, the electron is returning to its lower energy level ground state and energy is released in the form of a photon.
What pigment traps the energy for photosynthesis?
There is a wide range of pigments that are used for photosynthesis. However, chlorophyll is responsible for using obtained light energy to excite electrons to move through the transport chain. Many pigments are only capable of transferring energy to chlorophyll, but they are important because they increase the spectrum of the frequencies of light of which the organism can use to photosynthesize. These pigments are called accessory pigments. For a more detailed explanation of these pigments, view the attached link below.
When sunlight excites electrons how do the electrons change?
Depending on the energy (frequency) of the specific photon hitting the electron, one of three events happens: nothing, the electron is excited, or the electron leaves the atom. If the energy of the photon very high, the electron can absorb the energy and escape the nucleus' pull. This is called ionization. If the energy of the photon lines up with the energy spacing in the atoms energy levels, the electron will move to a higher energy state, becoming excited. The electron then returns to its original energy level, releasing the energy as light. If the energy of the photon does not fall into one of these categories, the electron does not interact with it. In terms of actually changing the electron, it only changes in energy, not any other property.
Is there any situation where an electron will have a charge not quantized ExOutside of an atom and if so what would happen if it had exess energy when it goes to an orbit?
The charge of an electron is always −1.602176487(40)×10−19 Coulomb. If an electron is ejected from it's orbital the energy it absorbs is in the form of kinetic energy i.e. how fast it moves. If the electron goes back into an orbital it will only be allowed in an orbital that allows for it's energy. If an atom has an electron and that electron absorbs the energy from an incoming photon it may jump up to a higher orbital or it may be ejected. The ejected electron is the principle of the photo-electric effect.
What part of the chlorophyll molecule absorbs light?
Chlorophyll does not aborbs light itself, it only absorbs light photonic energy to trigger chemical reaction.
