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Which of the following is not a property of laser light 7
(ಹ) Directionality (8) Monochromaticity
(C) Coherence (D) Divergence

The typical wavelengths emitted or absorbed in Mossbauer spectroscopic studies is in the
region of :

(A) gamma rays (B) X-rays (C) microwave (D) ‏علطنو‎

When an electron jumps from the fourth orbit to the second orbit, we get :
(A) Second line of Pfund series (8) Second line of Lyman series
(C) Second line of Balmer series (D) Second line of Paschen series

Cooper pairs are formed by :

(A) electron-phonon-electron interaction
(8) electron-proton interaction

(C) proton-phonon-proton interaction
(D) electron-hole interaction

The reciprocal lattice to an fcc lattice is :
(ಹಿ) anfcc lattice (8) a hep lattice (ಲ) a sclattice (D) a bec lattice

The region in k space at k= +Z is known 85 :
a

(ಹಿ) First Brillouine zone (B) First energy gap
(9) Second Brillouine zone (D) Band

If the applied external field is increased beyond the critical field, the material becomes :
(ಹಿ) a superconductor (8) normal conductor

(ಲ) insulator (D) semiconductor

According to free electron model, the average K.E. of electron at temperature T is :

(8) दशा ® तष © 17 (D) Zero

Which of the following is not a property of nuclear forces ?

(ಹಿ) charge independent (B) strong attractive force
(9) long range force (D) saturated force
5 065/2018

{P.T.O}