radiation consisting of waves of energy associated with electric and magnetic fields resulting from the acceleration of an electric charge
the entire frequency range of electromagnetic waves
the emission of a continuous range of frequencies of electromagnetic radiation
a diagram or graph that indicates the degree to which a substance emits radiant energy with respect to wavelength
the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
(physics) electromagnetic radiation that can produce a visual sensation
an insrument with a prism used to find out the elements of a star
change in the apparent frequency of a wave as observer and source move toward or away from each other
A shift of optical wavelengths toward the blue or in all cases towards shorter wavelengths; when the shift is caused by motion, from a velocity of approach.
A shift of optical wavelengths towards the red, or in all cases toward longer wavelengths.