A) the quantum state of a particle can be specified by giving a complete set of quantum numbers (n, l, ml, ms). how many different quantum states are possible if the principal quantum number is n = 5? to find the total number of allowed states, first write down the allowed orbital quantum numbers l, and then write down the number of allowed values of ml for each orbital quantum number. sum these quantities, and then multiply by 2 to account for the two possible orientations of spin.
b) what is the maximum angular momentum lmax that an electron with principal quantum number n= 3 can have? express your answer in units of ? . (you don't need to enter the ? , it is in the units field for you.)" with

Scientists use laser range-finding to measure the distance to the moon with great accuracy. a brief laser pulse is fired at the moon, then the time interval is measured until the "echo" is seen by a telescope. a laser beam spreads out as it travels because it diffracts through a circular exit as it leaves the laser. in order for the reflected light to be bright enough to detect, the laser spot on the moon must be no more than 1.0 km in diameter. staying within this diameter is accomplished by using a special large-diameter laser. part a if λ = 540nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km. express your answer to two significant figures and include the appropriate units.

When does your body conduct current more readily?

Which planet do you think would be easiest for humans to colonize some day?