A gas of monoatomic hydrogen is bombarded with a atream of electrons that have been accelerated from rest through a potential difference of `12.75 V`. In the emission spectrum, one can observe lines of
Text Solution
Verified by Experts
The energy gained by electrons accelerated form rest through a potential difference of 12.75V `= 12.75eV`. `:.` Total energy=`(12.75-13.6)eV=-0.85eV` If electrons go over to nth state, then `(-13.6)/(n^2)=-0.85` `n^2=(-13.6)/(-0.85)=16, n=sqrt(16)=4`. i.e., electron is shifted to 4th stationary orbit of hydrogen atom. The possible transitions are (i) `n_1=1 , n_2=4,3,2` first three members of Lyman series (ii) `n_1=2 , n_2=3,4` first two members of Balmer sereis `n_1=3, n_2=4` 1st member of Pashen series.
Topper's Solved these Questions
ATOMS AND NUCLEI
PRADEEP|Exercise (II) very short answer 16|1 Videos
ATOMS AND NUCLEI
PRADEEP|Exercise (I) Short Answer questions 1|1 Videos
COMMUNICATION SYSTEMS
PRADEEP|Exercise MODEL TEST PAPER-2|9 Videos
Similar Questions
Explore conceptually related problems
A sample of hydrogen gas in its ground state is irrdation with photon of 10.2eV energies The radiation from the above the sample is used to irradiate two other the sample of excited ionized He^(+) and excited ionized Li^(2+) , respectively . Both the ionized sample absorb the incident radiation. A gas of monoatomic hydrogen is bombared with a stream of electron that have been accelerated from rest through a potential difference of 12.75 volt. in the emission spectrum, one cannot observed any line of
Calculate the de Broglie wavelength of an electron that has been accelerated from rest through a potential differecne of 1kV.
The kinetic energy of an electron accelerated from rest through a potential difference of 5V will be
What is the de Broglie wavelength of an electron accelerated from rest through a potential difference of V volts?
Two electrons starting from rest are accelerated by equal potential difference.
A electron beam particle is accelerated from rest through a potential difference of V volt. The speed of the particle is
The linear momentum of an electron, initially at rest, accelerated through a potential difference of 100 V is
A cathod rays particle is accelerated from rest through a potential difference of V volt. The speed of the particle is
PRADEEP-ATOMS AND NUCLEI-Assertion- Reason type question 12
