What does photoelectric effect in plants refer to?

Answer 1

Photo relates to light. Of course light is electromagnetic wave. Electric relates to electron movement. So by making electromagnetic waves such gamma ray, X-ray, UV rays and even visible light we can eject electrons right from the surface of certain substances. This is termed as photo electric effect or emission.

Answer 2

The photo-electric effect is a phenomena, seen in certain metallic compounds, in which electrons fly out from that metal when it is exposed to light. Amongst the facts of this phenomena:

1) The ENERGY of the emitted electrons depends, not on the intensity of the light (ie, how much light energy is hitting the metal per area per second), but on the FREQUENCY of the light.

2) Below a certain frequency, no electrons come out from the metal no matter how intense is the light. Shine even a very low intensity light above this frequency, however, and photons do come out.

3) No matter how little energy per second is going into the metal, electrons come out from the metal pretty much instantaneously.

At the time, light was viewed as a vibrating, electro-magnetic wave. Viewing light in only that matter makes a full explanation of the photo-electric effect very difficult.

However, Albert Einstein noted that, if one uses the assumptions Max Planck had made earlier -- that light comes in "chunks" (Planck called them "quanta," and they were later called "photons") whose energy depends on the frequency of the light -- then all aspects of the photo-electic effect are easy to explain.

Prior to this, Planck had viewed his idea as a mathematical curiosity. At this point, scientists began to view the idea of photons as a physical reality.

Answer 3

A phenomenon where electrons are ejected when light strikes a metal surface.

Answer 4

photosynthesis