Radiation com in g from transitions n = 2 to n = 1 of hydrogen atoms fall on He+ ions in n = 1 and n = 2 states. The possible transition of helium ions as they absorb energy from the radiation is :
Sahay Sir > Question Answers > Radiation com in g from transitions n = 2 to n = 1 of hydrogen atoms fall on He+ ions in n = 1 and n = 2 states. The possible transition of helium ions as they absorb energy from the radiation is :
Suppose an electron is attracted toward the origin by a force k/r where k is a constant and r is the distance of the electron from the origin .By applying Bohr model to this system the radius of the nth orbital of the electron is found to be rn and the kinetic energy of the electron to be Tn , Then which of the following is true ?
28
Nov
Suppose an electron is attracted toward the origin by a force k/r where k is a constant and r is the distance of the electron from the origin .By applying Bohr model to this system the radius of the nth orbital of the electron is found to be rn and the kinetic energy of the [...]
Hydrogen (1H^1), deuterium (1H^2) singly ionised helium (2He^4)+ and doubly ionised lithium (3Li^8)++ all have one electron around the nucleus. Consider an electron transition from n = 2 to n=1. If the wavelengths of emitted radiation are λ1,λ2,λ3 and λ4, respectively for four elements, then approximately which one of the following is correct?
28
Nov
Hydrogen (1H^1), deuterium (1H^2) singly ionised helium (2He^4)+ and doubly ionised lithium (3Li^8)++ all have one electron around the nucleus. Consider an electron transition from n = 2 to n=1. If the wavelengths of emitted radiation are λ1,λ2,λ3 and λ4, respectively for four elements, then approximately which one of the following is correct? Hydrogen (1H1) [...]
Half-lives of two radioactive substances A and B are respectively 20 min and 40 min. Initially the samples of A and B have equal number of nuclei. After 80 min the ratio of remaining number of A and B nuclei is
28
Nov
Half-lives of two radioactive substances A and B are respectively 20 min and 40 min. Initially the samples of A and B have equal number of nuclei. After 80 min the ratio of remaining number of A and B nuclei is Radiation com in g from transitions n = 2 to n = 1 of [...]
Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t = 0 it was 1600 counts per second and t = 8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t = 6 seconds is close to :
28
Nov
Using a nuclear counter the count rate of emitted particles from a radioactive source is measured. At t = 0 it was 1600 counts per second and t = 8 seconds it was 100 counts per second. The count rate observed, as counts per second, at t = 6 seconds is close to : Radiation [...]
Surface of certain metal is first illuminated with light of wavelength λ1=350nm and then, by light of wavelength λ2=540 nm. It is found that the maximum speed of the photo electrons in the two cases differ by a factor of 2. The work function of the metal (in eV) is close to : (Energy of photon = 1240/λ(innm)eV)
28
Nov
Surface of certain metal is first illuminated with light of wavelength λ1=350nm and then, by light of wavelength λ2=540 nm. It is found that the maximum speed of the photo electrons in the two cases differ by a factor of 2. The work function of the metal (in eV) is close to : (Energy of [...]
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 [...]
Radiation com in g from transitions n = 2 to n = 1 of hydrogen atoms fall on He+ ions in n = 1 and n = 2 states. The possible transition of helium ions as they absorb energy from the radiation is :
28
Nov
Radiation com in g from transitions n = 2 to n = 1 of hydrogen atoms fall on He+ ions in n = 1 and n = 2 states. The possible transition of helium ions as they absorb energy from the radiation is : Radiation com in g from transitions n = 2 to n [...]