physics mcq

The most important characteristic of laser light, is 1. Coherence 2. Directionality 3. Monochromacity 4. Intensity

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The characteristic of light which is emitted by the electronic transitions which take place in an 'orderly way' and the light waves emitted M have a constant phase relation, is 1. Incoherence 2. Temporal coherence 3. Directionality 4. Intensity

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The light sources in which the electron transaction takes place at random in time and the light waves received at a point on a screen hear no definite phase relation among them, is 1. Ordinary light sources 2. Laser light sources 3. Both of these 4. None of these

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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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The no. of characteristic and striking proper ties with which a laser light is distinguished from an ordinary light, is 1. 2 2. 3 3. 4 4. 5

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The properties of laser light are not present in the light emitted from 1. Sun 2. Incandescent lamp 3. Sodium vapour lamp 4. All of these

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A monochromatic source of light among the following is 1. Sun 2. Incandescent lamp 3. Sodium vapour lamp 4. Candle light

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Laser is simply a 1. Source of light having ordinary properties 2. Source of light having extra-ordinary properties 3. Source of energy having extra ordinary properties 4. Source of energy having ordinary properties

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