Free tnpsc model questions Online Test - MeritNotes

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1. The elliptical orbits of electron in the atom were proposed by ___
 
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2. Laser beam is a _____
 
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3. The charge possessed by the canal rays is ___
 
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4. ____ is used to vapourize the unwanted material during the manufacture of electronic circuit on semiconductor chips.
 
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5. Who studied the diffraction of X-rays?
 
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6. Who developed ruby laser?
 
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7. ____ are used in endoscopy.
 
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8. X-rays were discovered by ____
 
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9. Canal rays travel in ____
 
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10. Which atom model explains the fine structure of spectral lines?
 
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