Q: The order of energies of energy levels, A, B and C is EA < EB < EC , if the wavelength corresponding to transitions C → B, B → A and C → A are λ1 , λ2 and λ3 respectively , then which of the following relations is correct ?
Q: A deutron of atomic mass 2·0147 a.m.u. and negligible kinetic energy is absorbed by a Li6 nucleus of mass 6·0169 a.m.u., the intermediate nucleus disintegrates spontaneously into two α – particles, each of mass 4·0039 a.m.u. The energy transferred to each α particle is
Q:A radioactive source, in the form of a metallic sphere of radius 10−2 m emits β particle at the rate of 1011 particle per second. The source is electrically insulated. The time required for its potential to be raised by 4 V assuming 60 % of emitted β particles escape the source is
Q: The radioactive isotope X with a half life of 109 years decays to Y which is stable. A sample of rocks was found to contain both the elements X and Y in the radio 1∶ 7. What is the age of the rocks ?