Answer Happy

? 4. Give your comments on the following statements.(choose only 5). { P Р a. T'sesuncertainty either in velocity or in position of an electron is significant. b. The blue colour of a clear sky c. Classical theory could not explain why there are some frequencies of excited lines generated from a gaz discharge tube are not absorbed by the same Gas in cold state. d. A Laser beam passing through a pure crystal will not be visible from the direction perpendicular to the line of propagation. X-rays are used very successfully to probe crystal structure. PODG is widely used in different appțications