Lenard and Hallwachs investigated the phenomenon of photoelectric effect in details during 1886-1902 through experiments. Write any two characteristic features observed in the above experiment?

Write any two observations of the photoelectric effect experiment.

In the photoelectric effect experiment certain soft metals are exposed to light of particular frequency. Write any two observations of the photoelectric effect experiment.

Consider the random experiment of throwing two dice together Write any two events which are mutually exclusive and exhaustive from the above experiment

During Rutherford alpha - ray experiment, it was observed that most of the alpha particles passed through the Gold foil without any deflection, a small fraction deflected by small angles and very few bounced back. c) What are the main drawbacks of this model and how Niels Bohr overcome these defects in his model?

During Rutherford alpha - ray experiment, it was observed that most of the alpha particles passed through the Gold foil without any deflection, a small fraction deflected by small angles and very few bounced back. a) What are the main conclusions made by Rutherford?