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Why does violet light eject electrons from a certain photosensitive surface whereas red light has no effect on that surface?
Violet light has higher energy photons compared to red light. This higher energy allows violet light photons to transfer enough energy to electrons in the photosensitive surface to eject them, a process known as the photoelectric effect. Red light photons do not have enough energy to overcome the work function of the surface and therefore cannot eject electrons.
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What is the difference between field emission and photoelectric emission?
* emisssion of electron from the surface of the metal when light of suitable frequency falls-photoelectric emission. * emision of electron from the metal by quantum tunnling of electron.
What is the difference between a hidden surface and an invisible surface?
A hidden surface refers to a surface that is obscured from view by other objects in a scene, while an invisible surface is one that is intentionally made invisible or transparent, such as a glass pane. Hidden surfaces can be revealed by changing the camera angle, whereas invisible surfaces are typically always transparent.
What are two differences between the nucleus of an atom and the electrons of an atom?
The nucleus of an atom has a positive electrical charge, the electrons have a negative electrical charge, and the nucleus is thousands of times heavier than the electrons (the exact ratio of weight varies, because although there are always as many protons as electrons, in a neutral atom, the number of neutrons varies).
What are the Differences between thermionic emission and photoelectric emission?
Electrons would have enough energy to leave the metal surface, the hot cathode. However, without the forward voltage bias, positive anode. The vacuum diode could not conduct electricity. In other words, the initial kinetic energy of the emitted electrons can be ignored [0 J].Whereas, the photo-emitted electrons possess definite amount of initial kinetic energy.K.E. of e = hf - WorkFunctionSee, the initial k.e. is not neglectable.
What is the difference between a counductor and an insulator?
A conductor is a material that allows the flow of electrical current, while an insulator is a material that resists the flow of electrical current. Conductors have high conductivity, allowing electrons to flow easily, whereas insulators have low conductivity, preventing the flow of electrons.
What is Electrical charge with more electrons than protons?
Negative ... which is what electrons are, (whereas protons are positive).
Does ionic compound or molecular compound share electrons?
covalent compound is formed by the sharing of electrons whereas ionic compound is formed by the transfer of electrons.
Is oxygen a radical?
Oxygen itself is not a radical. A radical is a species with at least one unpaired electron, whereas oxygen typically exists as O2, which has paired electrons. However, oxygen can form radicals in certain conditions, such as during cellular respiration or in the presence of certain pollutants.
What is a property of protons and electrons that determines the electromagnetic interaction between them?
The charges on them. Protons are positively charged whereas electrons are negatively charged
How many electrons are located in the first two shell?
the first shell of electrons has only 2 spaces in it before it is full whereas the 2nd shell has 8 electrons in it to be full.
Why does the image appear 2D in a TEM and 3D in a SEM?
In a Transmission Electron Microscope (TEM), electrons pass through a thin sample, generating a 2D projection of the internal structures, which results in a flat image. In contrast, a Scanning Electron Microscope (SEM) scans the surface of a sample with focused electrons, producing detailed 3D-like images by collecting secondary electrons emitted from the surface. The SEM's ability to visualize surface topology and texture contributes to the perception of depth, whereas the TEM focuses on internal features, leading to a more planar representation.
What type of surface is a box?
A box is not any kind of surface because a box is a 3-dimensional object whereas a surface is 2 dimensional.
What is a conductor and a insulater?
A conductor is any material in which electrons are free to flow, whereas an insulator is any material in which the electrons are tightly bound to the molecules with which they are associated.
Why are metals good conductors but plastic not?
Plastics are filled with covalent bonds ... which block the flow of electrons. Whereas metals share their electrons, thus facilitating their flow.
What is the difference between field emission and photoelectric emission?
* emisssion of electron from the surface of the metal when light of suitable frequency falls-photoelectric emission. * emision of electron from the metal by quantum tunnling of electron.
Who has more electrons nitrogen calcium oxygen or sodium?
Calcium has the most electrons. Nitrogen has 7, calcium has 20, oxygen has 16 and sodium has 11 electrons.
What is the innermost shell of nitrogen?
The inner most shell is the K shell with 2 electrons whereas the outer shell or the L shell has 5 electrons
