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1) Fe emits K(alpha) xray of energy 6.4kev and Ca emits K(alpha) x ray of energy 3.69kev. find times taken by an Fe and Ca K(alpha) photon to cross thru a dist of 3km 2)an x ray tube operates at 40kv. an electron converts 70% of its energy into a photon at each collision. Find the lowest 3 wavelenghts emitted from tube. 3)a free atom of Fe emits K(alpha) x rays of energy 6.4kev. Find recoil kinetic energy of the atom. mass of iron atom = m 4) A neutron having KE 12.5 ev collides with an H atom.at rest. find possible kinetic energies of neutron after event if it doesnt leave its line of motion. 5)A filter transmits only radiation of wavelentgh more than 440nm. Radiation frm a H-discharge tube goes thru such a filter and is incident on a metal of work- function 2 ev. Find stopping potential wich can stop photoelectrons.


1) Fe emits K(alpha)  xray of energy 6.4kev and Ca emits K(alpha) x ray of energy 3.69kev. find times taken by an Fe and Ca K(alpha) photon to cross thru a dist of 3km
 
2)an x ray tube operates at 40kv. an electron converts 70% of its energy into a photon at each collision. Find the lowest 3 wavelenghts emitted from tube.
 
3)a free atom of Fe  emits K(alpha) x rays of energy 6.4kev. Find recoil kinetic energy of the atom. mass of iron atom = m
 
4) A neutron having KE 12.5  ev collides with an H  atom.at rest. find possible kinetic energies of neutron after event if it doesnt leave its line of motion.
 
5)A filter transmits only radiation of wavelentgh more than 440nm. Radiation frm a H-discharge tube  goes thru such a filter and is incident on a metal of work- function 2 ev. Find stopping potential wich can stop photoelectrons.


Grade:10

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