Physics Questions And Answers :: Laser: part1



Basic Science : Laser QUESTIONS AND ANSWERS :: part1 : 1 to 5

Following Basic Science multiple choice objective type questions and answers will help you in many types of 2014 job and other entrance examinations :

1.Laser can be used in the

fission reaction
polarization
thermo-nuclear fusion
production of white light

2.In Ruby laser the atoms are excited by

ruby rod
flash tube
silvered mirror
semi-transparent mirror

3.Laser light is intense because

it has very less number of Photons that in phase
it has very less number of Photons that are not in phase
it has very large number of Photons that are in phase
it has very large number of Photons that are not in phase

4.The number of atoms in the excited state becomes much greater than the number of atoms in the ground state. This is known as

normal population
population inversion
stimulated emission
spontaneous emission

5.The light from a laser source is monochromatic because all the photons

are in phase
have same energy
have same amplitude
are in the same direction

More Laser QUESTIONS AND ANSWERS available in next pages

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