PHOTOELECTRIC EFFECT - Part 1 | Work Function, Threshold Frequency | video in HINDI
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- Опубликовано: 25 авг 2024
- In this Physics video lecture in Hindi for class 12 we discussed on Photoelectric effect and derived Einstein's photoelectric equation. Few terms we discussed here are photoelectrons, photoelectric current, work function, threshold frequency, photon etc. When radiation of sufficient frequency incidents on a metallic surface, electrons are emitted from that, known as photoelectrons. The minimum energy required to eject a free electron from the metallic surface is known as work function. The minimum frequency for which photoelectric effect occurs is known as threshold frequency.
We also discussed on the laws of photoelectric emission :
(1) Frequency of incident radiation ≥ Threshold frequency
(2) Maximum kinetic energy of photoelectrons depends upon the frequency of photon (and does not depend upon intensity of radiation)
(3) Number of photoelectrons ∝ intensity of radiation (and does not depend upon frequency)
(4) Photoelectric emission starts as soon as radiation falls on metal surface
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Arijit Daripa
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thank you for your help and advice to help me
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SAB KUCH SAMAJ AA GYA SIR!! THANKS SIR 👍 OP EXPLANATION.
Hello sir ur videos are amazing .. I have a doubt that if a electron accepts only one photon's energy at a time so is it not possible that the photon will accept energy of one photon at one time and the energy of other photon at next time and in this continue process electron will be able to emmit at that light whose frequency is less than threshold frequency ?
Plz reply..
Thanks
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Sir main ek cheez main bhut confuse hu ki particle ki frequency ki definition same hai wave ki frequency ke toh us hisaab se toh photon ki frequency speed ke saath badni chahiye kyoki speed bdegi toh no. of photons jo certain point se pass krte hai woh badenge but photon ki speed constant hai toh particle ki frequency ka exact mtlb or jab hum kehte hai ki particle ki frequency jyada hai to Kya change hota hai pls madad kijiye explain 🙏🙏
Chal hat
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Jab wo photo electron bahar niklega metal se toh uski kinetic energy se uska distance pata kar sakte hai ki wo kitna distance travell karega?
Haaa it can be calculated Abhishek
U can calculate it
By applying motion third equation by taking intial velocity as 0 ,by applying that you will be left with "ma"that u need to find physical quantity force which can be calculated by momentum or by collision factor
Finally there wil be confusion
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Number do apna
Sir if frequency of incident ray on the metallic surface less than the the threshold frequency then is the electron emission possible
No !
No!
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Sir can u make video on "what is quantum mechanics " nd "how does it deffer from classical mechanics"
In which we study about this branch of physics ...
?????
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Very nice explanation......
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