How does the photoelectric effect show that light has properties of a stream of particles?

Answer 1

supports photon particle model as E=hf is supplied in discrete corpuscular quanta; increasing Intensity below fo gives no photoemission (not cumulative as suggested by wave theory- theoretically there will only be delay until photoemmission)

Answer 2

When some metals are exposed to light, an electric current can be produced. How much current depends on the wavelength, but the point is some particle in light, the photon, is interacting with electrons in the atoms, displacing them.
BOO YA!

Answer 3

-- Shine a red light onto a metal surface. No matter how bright the red light is, and

no matter how long you wait, the light energy will not kick any electrons out of the

atoms on the surface of the metal.

-- Shine a violet or ultraviolet light onto the same metal surface. No matter how dim the

violet light is, it will kick electrons out of the atoms on the surface of the metal immediately.

The brighter the light is, the more electrons will be ejected, but they will all have the same

kinetic energy.

Answer 4

-- The photoelectric effect is the ability to knock electrons off of the atoms

on the surface of a solid by shining a light at it.

-- For some colors of light, it doesn't matter how bright and intense the light is,

no electrons separate from the solid.

-- For other colors of light, it doesn't matter how dim and weak the light is,

electrons do separate from the solid.

-- The dividing line between the colors that do and the colors that don't is

a certain wavelength of light ... the one where each particle of light has

at least enough energy to rip an electron away from an atom.

-- If each particle of light has less energy than that, then no matter how many

particles there are, they can't separate electrons from their atoms.

-- If each particle of light has more energy than that, than it doesn't matter

how few of them there are. A single particle can rip an electron away from an

atom. The energy that's left over shows up as the kinetic energy of the electron

as it comes flying away from the surface.