8. Among the following scientists, the one who is credited for the contribution to theory of condensed matter is (1) Ernest Orlando Lawrence (2) C.V. Raman (3) Ernest Rutherford (4) Lev Davidovich Landau 9. Full form of LASER is (1) Light amplification by shorted extraction of rays (2) Light amplification by stimulated emission of radiation (3) Long absorption of silent extraction of radiation (4) None of the above 10. Choose the incorrect statement among the following in relation to the electromagnetic waves. (1) Electromagnetic force do not require intervening medium (2) They act over large distances (3) Electromagnetic force is weaker than the gravitational forces (4) Electromagnetic forces may be
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