Alow intensity light beam emitting about 10 photons/s impinges on a young's experiment in which the slits are spaced by a distance equal to 5 times the wavelength (300 nm). where will the first few photon counts be detected if a screen at distance 100 cm is covered with an array of photon counters?

a. the initial counts will appear in a single spot on the axis.
b. the initial counts will appear at a positions 0.035 cm above and below the axis.
c. the initial counts will appear at the first maxima on either side of the axis.
d. one cannot predict where the first counts appear but just the probability distribution.
e. the initial counts will appear in direct line with the two slits.

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.