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rakish (2)
Raksha Bandhan
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Raman effect

Ra·man ef·fect


noun 
Definition:
 
change in light: the change in wavelength and phase exhibited by monochromatic light passing through a transparent medium. The scattering that results is used in Raman spectroscopy to obtain information about the structure of molecules.

[Early 20th century. After Sir Chandrasekhara Venkata Raman]
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