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- Dictionarythreshold/ˈθrɛʃ(h)əʊld/
noun
- 1. a strip of wood or stone forming the bottom of a doorway and crossed in entering a house or room: "he stood on the threshold of Sheila's bedroom" Similar
- 2. the magnitude or intensity that must be exceeded for a certain reaction, phenomenon, result, or condition to occur or be manifested: "nothing happens until the signal passes the threshold"
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Threshold energy = Energy of normal molecules + Activation energy. View Solution.
Solution. Photo electrons are emitted from the metal surface only if the wavelength of the incident radiation falling on the metal surface is smaller then the threshold wavelength of the metal surface. Thus threshold wavelength is the maximum wavelength that the incident radiation must have so that photoelectric effect takes place.
The threshold frequency is defined as the minimum frequency of incident radiation below which the photoelectric emission is not possible completely. irrespective of the intensity of incident radiation.
Work function: The least energy which can eject the electrons from the surface of the metal. Was this answer helpful? 22. Similar Questions. Q 1. Define the following: Threshold frequency and work function. View Solution. Q 2.
It threshold frequency will be: View Solution. Q 5. The work function of a photoelectric material is 3.3 eV. The threshold frequency will be equal to. View Solution. Click here:point_up_2:to get an answer to your question :writing_hand:define threshold frequency and photoelectric work function.
Define the term “threshold frequency”, in the context of photoelectric emission. View Solution. Q 3. Solve this: Q24. Define the terms 'threshold frequency' and 'stopping potential' in the study of photoelectric emission. (2/5, Foreign 2010) View Solution. Q 4.
Define the terms (i) cut off voltage and (ii) threshold frequency relating to the phenomenon of photoelectric effect. Using Eninstein's photoelectric equation show that how cut off voltage and threshold frequency can be determined with the help of a suitable graph.
(a) Threshold energy: The minimum amount of energy which the reactant molecules should possess for effective collision. (b) Energy of Activation: According to Arrhenius any chemical reaction is only possible when reacting molecules are activated with minimum energy which is called threshold energy. Kinetic energy of most of the molecules are ...
Define (i) Stopping potential, (ii) Photoelectric work function. View Solution.
Define the terms (i) 'cut-off voltage' and (ii) 'threshold frequency' in relation to the phenomenon of photoelectric effect. Using Einstein's photoelectric equations show how the cut-off voltage and threshold frequency for a given photosensitive material can be determined with the help of a suitable plot/graph.
