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A photon is always emitted when an electron moves from:
NET
NUST Entry Test
Physics
Atomic Spectra
$K_{\beta}$ X-rays are actually:
NET
NUST Entry Test
Physics
Atomic Spectra
X-ray photons are:
NET
NUST Entry Test
Physics
Atomic Spectra
The anode used in the X-ray tube is usually made of:
NET
NUST Entry Test
Physics
Atomic Spectra
X-ray tube used for production of X-rays contains:
NET
NUST Entry Test
Physics
Atomic Spectra
The study of characteristic X-ray spectra has played an important role in the study of:
NET
NUST Entry Test
Physics
Atomic Spectra
The energy difference between first and second orbit of hydrogen atom is:
NET
NUST Entry Test
Physics
Atomic Spectra
The transition of the electrons in the hydrogen atom result in the emission of spectral lines in the:
NET
NUST Entry Test
Physics
Atomic Spectra
X-rays are:
NET
NUST Entry Test
Physics
Atomic Spectra
Energy required by an electron revolving in certain orbit to jump to an excited state is called:
NET
NUST Entry Test
Physics
Atomic Spectra
The value of $\frac{E_{o}}{hc}$ comes out to be equal to the value of:
NET
NUST Entry Test
Physics
Atomic Spectra
By notation, the distance of nth orbit from the nucleus is:
NET
NUST Entry Test
Physics
Atomic Spectra
Normally the electron of the hydrogen atom is in the energy state which is:
NET
NUST Entry Test
Physics
Atomic Spectra
Energy required to remove an electron completely from the first Bohr orbit is given by:
NET
NUST Entry Test
Physics
Atomic Spectra
The speed of the electron in the nth orbit is given as:
NET
NUST Entry Test
Physics
Atomic Spectra
The radius of the first Bohr orbit of hydrogen atom is:
NET
NUST Entry Test
Physics
Atomic Spectra
The radii of different orbits around the nucleus of an atom are given by:
NET
NUST Entry Test
Physics
Atomic Spectra
Tick the correct equation:
NET
NUST Entry Test
Physics
Atomic Spectra
Prince de Broglie suggested for the length of Bohr's orbit that:
NET
NUST Entry Test
Physics
Atomic Spectra
Whenever an electron makes a transition:
NET
NUST Entry Test
Physics
Atomic Spectra
mvr is an expression for:
NET
NUST Entry Test
Physics
Atomic Spectra
Only those orbits are allowed for the electrons of hydrogen atom for which orbital angular momentum is equal to an integral multiple of:
NET
NUST Entry Test
Physics
Atomic Spectra
During the transition of electron of hydrogen atom from higher orbit to third orbit, a photon of:
NET
NUST Entry Test
Physics
Atomic Spectra
When the electron of hydrogen atom is made to jump from lower orbit to fourth orbit, a photon of:
NET
NUST Entry Test
Physics
Atomic Spectra
An electron of the hydrogen atom in the second orbit is called its:
NET
NUST Entry Test
Physics
Atomic Spectra
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