Consider a 500 mW laser emitting a 514 nm light beam that has a 3.00 mm diameter circular cross section

( a ) What is the laser beam's intensity ?

( b ) What is the electric field amplitude in this laser beam ?

( c ) What is the magnetic field amplitude in this laser beam ?

( d ) What is the frequency of this green laser light ?

In an episode of the TV show " Big Bang Theory , " the scientists direct light from a laser with this frequency onto a mirror left on the moon by Apollo 11 astronauts . They report that the laser light takes 2.60 seconds to travel to the moon and reflect back to their detector . ( e ) How far away , as measured in the length unit km , is the moon ?