In the online life, security is always a concern. The following link will show the amount of time a PC needs to find your password. The password cracking programs use sort of random generators but are clever enough to check for complete words. So never use a word which exists in the dictionary. As usual, [...]
Archive for February, 2012
How strong is your password?
Posted in life on February 18, 2012 | Leave a Comment »
Energy of earthquakes
Posted in Physics, tagged earthquake on February 11, 2012 | Leave a Comment »
The expression Richter magnitude scale refers to a ways to assign a single number to quantify the energy contained in an earthquake. In this system invented by Charles Richter in 1935, one magnitude more is roughly equal to a factor 32 more energy. That means an earthquake of magnitude 6.0 has 32 times more energy [...]
Problems in quantum mechanics (1)
Posted in Physics, tagged Quantum Mechanics on February 6, 2012 | Leave a Comment »
Consider a one dimensional time-independent Schrödinger equation for some arbitrary potential V(x). Prove that if a solution Ψ(x) has the property that Ψ(x) →0 as x→±∞, then the solution must be nondegenerate and therefore real, apart from a possible overall phase factor. Solution
