during the experiment diavisson and germer observed normal readings(nothing unusual),then their nickel target got oxidised ,then they decided to anneal it.After annealing they got the famous result we all studied.What did annealing change about the nickel crystal?how?in brief
When we study the birth of stars it is always mentioned, an atmosphere of hydrogen, helium and dust? What exactly is this dust? What are its main chemical constituents why is it involved in the birth of most galactic bodies
How do asteroseismologists accurately record the sound of a star because the medium between is vacuum ? How do they extract all the data about the planet from it?especially how do they predict the temperature of a star?