physics mcq class 12
The most important characteristic of laser light, is
1. Coherence
2. Directionality
3. Monochromacity
4. Intensity
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The basic scientific principle behind laser was first put forward by
1. Rontgen
2. J.J. Thomson
3. Dr. Charles & H. Townes
4. Einstein
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ICBM stands for
1. Inter-Continental Ballistic Missile
2. Inter-Country Ballistic Missile
3. Inter-Community Ballastic Missile
4. All of these
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The light excited energy which is emitted when the electrons in atoms undergo transitions to the ground state, is
1. Visible light energy
2. Laser light energy
3. UV light energy
4. None of these
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