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Spectroscopy

19. 

Laser is a

A. magnetic waves B. micro waves C. coherent waves D. x-rays

Answer : C. coherent waves

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20. 

Arrange the discending order of wave length (long to short)
I. Infra-red
II. Ultra violent
III. Gamma rays
IV. Micro waves

A. IV,I,II,III B. I,IV,II,III C. I,II,III,IV D. III,II,I,IV

Answer : A. IV,I,II,III

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21. 

why does diamond shine at night?

A. Diamonds are radioactive, so there are radiations B. On account of high refractive Index, the ray of light get internally reflected C. They have some amount of Radium in them D. It has tetrahedral molecular structure

Answer : D. It has tetrahedral molecular structure

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22. 

X-rays travel with the velocity of

A. light B. sound C. positive rays D. alpha rays

Answer : A. light

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23. 

Waves produced on the surface of water is

A. longitudinal B. transverse C. stationary waves D. electromagnetic wave

Answer : B. transverse

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24. 

The electromagnetic spectrum spans over __________ of magnitude of photon energy

A. 15 orders B. 20 orders C. 25 orders D. 30 orders

Answer : A. 15 orders

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