मराठी

Calculate the Wavelength of Radiation Emitted When Electron in a Hydrogen Atom Jumps from N=Infinity to N=1 - Physics

Advertisements
Advertisements

प्रश्न

Calculate the wavelength of radiation emitted when electron in a hydrogen atom jumps from n = `oo` to n = 1.

Advertisements

उत्तर

The electron in the hydrogen atom jumps from n2 = `oo`to n1 = 1. Now, we know that

`:.1/lambda= R(1/(n_1^2)-1/(n_2^2))`

`:.1/lambda=1.097xx10^7(1/1-1/oo)=1.097xx10^7`

`:.1/(1.097xx10^7)=9.116xx10^-8" " m= 911.6xx10^(-10)m`

 ∴ λ = 911.6 Å

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2015-2016 (March) All India Set 3 N

व्हिडिओ ट्यूटोरियलVIEW ALL [2]

संबंधित प्रश्‍न

State clearly how photoelectric equation is obtained using the photon pictu.re of electromagnetic radiation.


Write the three salient features observed in photoelectric effect which can be explained using this equation.


Define the term ‘stopping potential’ in relation to photo-electric effect.


Cathode rays constitute a stream of _______________ .


Cathode rays are passing through a discharge tube. In the tube, there is ______________ .


A discharge tube contains helium at low pressure. A large potential difference is applied across the tube. Consider a helium atom that has just been ionised due to the detachment of an atomic electron. Find the ratio of the distance travelled by the free electron to that by the positive ion in a short time dt after ionisation.


Two discharge tubes have identical material structures and the same gas is filled in them. The length of one tube is 10 cm and that of the other tube is 20 cm. Sparking starts in both the tubes when the potential difference between the cathode and the anode is 100 V. If the pressure in the shorter tube is 1.0 mm of mercury, what is the pressure in the longer tube?


The saturation current from a thoriated-tungsten cathode at 2000 K is 100 mA. What will be the saturation current for a pure-tungsten cathode of the same surface area operating at the same temperature? The constant A in the Richardson-Dushman equation is 60 × 104 Am −2 K−2 for pure tungsten and 3.0 × 104 Am −2 k−2 for thoriated tungsten. The work function of pure tungsten is 4.5 eV and that of thoriated tungsten is 2.6 eV.


On what factor does the maximum kinetic energy of the photoelectrons in a photo cell depend?


The electric field at a point associated with a light wave is given by

E = 200[sin(6 × 1015)t + sin(9 × 1015)t]Vm-1

Given: h = 4.14 × 10-15 eVs.

If this light falls on a metal surface having a work function of 2.50eV, the maximum kinetic energy of the photoelectrons will be ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×