Answers

2014-10-04T03:36:24+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
1. Dual nature of the electromagnetic radiation. So the radiation has particle like
     properties and wave properties.
           establishment of electromagnetic wave spectrum for visible and invisible
           waves.
 
2. Experiments on spectra of atoms. The results were explainable only by assuming that the electrons have quantized energy levels.

     Planck's quantum theory, photoelectric effect. Emission and absorption
     spectra. Line spectrum of Hydrogen and Balmer series.

2 3 2
2014-10-04T18:58:26+05:30
1) dual nature of matter
2)electromagnetic spectrum
3)photoelectric effect

0