हिंदी

The wavelength λe of an electron and λp of a photon of same energy E are related by ______.

Advertisements
Advertisements

प्रश्न

The wavelength λe of an electron and λp of a photon of same energy E are related by ______.

विकल्प

  • λp ∝ λe

  • `λ_p ∝ sqrt(lambda_e)`

  • `λ_p ∝ 1/sqrt(lambda_e)`

  • `λ_p ∝ lambda_e^2`

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

The wavelength λe of an electron and λp of a photon of same energy E are related by `bbunderline(lambda_p prop lambda_e^2)`.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 8: Dual Nature of Radiation and Matter - Evaluation [पृष्ठ १३५]

APPEARS IN

सामाचीर कलवी Physics - Volume 1 and 2 [English] Class 12 TN Board
अध्याय 8 Dual Nature of Radiation and Matter
Evaluation | Q I. 1. | पृष्ठ १३५

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

Find the (a) maximum frequency and (b) minimum wavelength of X-rays produced by 30 kV electrons.


An isolated metal sphere is heated to a high temperature. Will it become positively charged due to thermionic emission?


A diode value is connected to a battery and a load resistance. The filament is heated, so that a constant current is obtained in the circuit. As the cathode continuously emits electrons, does it become more and more positively charged?


The constant A in the Richardson−Dushman equation for tungsten is 60 × 104 A m−2K−2. The work function of tungsten is 4.5 eV. A tungsten cathode with a surface area 2.0 × 10−5 m2 is heated by a 24 W electric heater. In steady state, the heat radiated by the heater and the cathode equals the energy input by the heater and the temperature becomes constant. Assuming that the cathode radiates like a blackbody, calculate the saturation current due to thermions. Take Stefan's Constant = 6 × 10−8 W m−2 K−1. Assume that the thermions take only a small fraction of the heat supplied.


Answer the following question.
Define the term "Threshold frequency", in the context of photoelectric emission.


If a light of wavelength 330 nm is incident on a metal with work function 3.55 eV, the electrons are emitted. Then the wavelength of the wave associated with the emitted electron is (Take h = 6.6 × 10–34 Js)


Define the work function of a metal. Give its unit.


In which case is electron emission from a metal not known?


Consider Figure for photoemission.

How would you reconcile with momentum conservation? Note light (photons) have momentum in a different direction than the emitted electrons.


Give an example each of a metal from which photoelectric emission takes place when irradiated by

  1. UV light
  2. visible light.

What is responsible for electrical conduction in metals?


What is electron emission?


What must supplied energy enable a metal electron to overcome for electron emission to occur?


Which particles at the surface hold free electrons inside the metal?


Which is an example of thermionic emission?


What causes field emission?


What must fall on a metal surface for photoelectric emission to occur?


Which is an example associated with photoelectric emission?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×