UV consists of broad absorption bands which have greater utility for (a)  

If the compound absorbs light at a particular wavelength, then the (a)   of the sample beam will be less than that of the reference beam.

In a colorimeter, a beam of light is directed through a (a)   containing a solution of the compound being analysed.

The electromagnetic spectrum is the range of frequencies (the spectrum) of (a)   and their respective wavelengths and photon energies.

If electromagnetic radiations of a certain wavelength range are passed through the substance under analysis, radiations of certain wavelengths are (a)   by the substance.

Explain the working of Calorimeter?