JEE Mains Physics 2002-2019 Solved Video Solutions
Consider an electron in a hydrogen atom, revolving in its second excited state (having radius 4.65Å). The de-Broglie wavelength of this electron is :
28
Nov
Consider an electron in a hydrogen atom, revolving in its second excited state (having radius 4.65Å). The de-Broglie wavelength of this electron is : Consider an electron in a hydrogen atom revolving in its second excited state (having radius 4.65Å). The de-Broglie wavelength of this electron is : November 28, 2020 Category: Chapter 18 - [...]
The electron in hydrogen atom first jumps from third excited state to second excited state and subsequently to the first excited state. The ratio of the respective wavelength λ1:λ2 of the photons emitted in this process is
28
Nov
The electron in hydrogen atom first jumps from third excited state to second excited state and subsequently to the first excited state. The ratio of the respective wavelength λ1:λ2 of the photons emitted in this process is Radiation com in g from transitions n = 2 to n = 1 of hydrogen atoms fall on [...]
An excited He+ ion emits two photons in succession, with wavelengths 108.5 nm and 30.4 nm, in making a transition to ground state. The quantum number n, corresponding to its initial excited state is (for photon of wavelength λ, energy E=1240eV/λ(in nm) ;
28
Nov
An excited He+ ion emits two photons in succession, with wavelengths 108.5 nm and 30.4 nm, in making a transition to ground state. The quantum number n, corresponding to its initial excited state is (for photon of wavelength λ, energy E=1240eV/λ(in nm) ; An excited He+ ion emits two photons in succession corresponding to its [...]
Two radioactive substances A and B have decay constants 5λand λ respectively. At t=0, a sample has the same number of two nuclei. The time taken for the ratio of number of nuclei to become (l/e)^2 will be
28
Nov
Two radioactive substances A and B have decay constants 5λand λ respectively. At t=0, a sample has the same number of two nuclei. The time taken for the ratio of number of nuclei to become (l/e)^2 will be a sample has the same number of two nuclei. The time taken for the ratio of number [...]
In Li++, electron in first Bohr orbit is excited to a level by a radiation of wavelength λ. when the ion gets de excited to the ground state in all possible ways (including intermediate emissions), a total of six spectral lines are observed. What is the value of λ ? (Given : h = 6.63 × 10^−34Js; c = 3 × 10^8ms^−1) ;
28
Nov
In Li++, electron in first Bohr orbit is excited to a level by a radiation of wavelength λ. when the ion gets de excited to the ground state in all possible ways (including intermediate emissions), a total of six spectral lines are observed. What is the value of λ ? (Given : h = 6.63 [...]
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a total of six spectral lines are observed. What is the value of λ ? (Given : h = 6.63 × 10^−34Js; c = 3 × 10^8ms^−1) ; ,
electron in first Bohr orbit is excited to a level by a radiation of wavelength λ. when the ion gets de excited to the ground state in all possible ways (including intermediate emissions) ,
In Li++ ,
Two radioactive materials A and B have decay constants 10λ and λ, respectively. It initially they have the same number of nuclei, then the ratio of the number of nuclei of A to that of B will be 1/e after a time :
28
Nov
Two radioactive materials A and B have decay constants 10λ and λ, respectively. It initially they have the same number of nuclei, then the ratio of the number of nuclei of A to that of B will be 1/e after a time : respectively. It initially they have the same number of nuclei then the [...]
A He+ ion is in its first excited state. Its ionization energy is
28
Nov
A He+ ion is in its first excited state. Its ionization energy is A He+ ion is in its first excited state. Its ionization energy is November 28, 2020 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 Solved Video Solutions ,
Taking the wavelength of first Balmer line in hydrogen spectrum (n = 3 to n = 2) as 660 nm, the wavelength of the 2nd Balmer line (n = 4 to n = 2) will be :
28
Nov
Taking the wavelength of first Balmer line in hydrogen spectrum (n = 3 to n = 2) as 660 nm, the wavelength of the 2nd Balmer line (n = 4 to n = 2) will be : Taking the wavelength of first Balmer line in hydrogen spectrum (n = 3 to n = 2) as [...]
The ratio of mass densities of nuclei of 40Ca and 16O is close to
28
Nov
The ratio of mass densities of nuclei of 40Ca and 16O is close to The ratio of mass densities of nuclei of 40Ca and 16O is close to November 28, 2020 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 Solved Video Solutions ,
A nucleus A, with a finite de-Broglie wavelength λA, undergoes spontaneous fission into to nuclei B and C of equal mass. B flies in the same direction as that of A, while C flies in the opposite direction with a velocity equal to half of that of B. The de-Broglie wavelengths λB and λC of B and C are respectively
28
Nov
A nucleus A, with a finite de-Broglie wavelength λA, undergoes spontaneous fission into to nuclei B and C of equal mass. B flies in the same direction as that of A, while C flies in the opposite direction with a velocity equal to half of that of B. The de-Broglie wavelengths λB and λC of [...]
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A nucleus A ,
undergoes spontaneous fission into to nuclei B and C of equal mass. B flies in the same direction as that of A ,
while C flies in the opposite direction with a velocity equal to half of that of B. The de-Broglie wavelengths λB and λC of B and C are respectively ,
with a finite de-Broglie wavelength λA ,