Chemistry, asked by futuredoctorsimmi, 1 year ago

what are photoelectric effect substances? how does they ionise electromagnetic rays?​

Answers

Answered by RAVICHA
2

Answer:

Explanation:

Photoelectric effect

PHYSICS

WRITTEN BY: The Editors of Encyclopaedia Britannica

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Alternative Title: photoemission

Photoelectric effect

QUICK FACTS

KEY PEOPLE

Albert Einstein

Robert Millikan

Philipp Lenard

RELATED TOPICS

Electromagnetic radiation

Photoconductivity

Photo-ionization

Einstein relation

Photoelectric absorption

Photoelectron

Photoelectric work function

Photoelectric threshold frequency

Photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it. In a broader definition, the radiant energy may be infrared, visible, or ultraviolet light, X rays, or gamma rays; the material may be a solid, liquid, or gas; and the released particles may be ions (electrically charged atoms or molecules) as well as electrons. The phenomenon was fundamentally significant in the development of modern physics because of the puzzling questions it raised about the nature of light—particle versus wavelike behaviour—that were finally resolved by Albert Einstein in 1905. The effect remains important for research in areas from materials science to astrophysics, as well as forming the basis for a variety of useful devices.

Answered by ajay5325
0

Answer:

When electromagnetic radiation interacts with an atom, iteither excites electrons to a higher energy level known as an excited state, or, if the energy of the light is sufficiently high, it can ionize the atom by removing the electron.

Explanation:

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