Question

Photoelectric effect can be explained by assuming that light ___________.
A. Can be polarised
B. Consist of quanta
C. Is a form of transverse wave
D. Longitudinal wave

Answer 1

Hint: Electrons are emitted when electromagnetic radiation, such as light, strikes a material. Photoelectrons are electrons that are emitted in this way. Condensed matter physics, solid state chemistry, and quantum chemistry all study the phenomenon in order to derive conclusions about the properties of atoms, molecules, and solids.

Complete answer:
When a substance absorbs electromagnetic radiation, electrically charged particles are emitted from or within it, causing the photoelectric effect. The ejection of electrons from a metal plate when light falls on it is a common definition of the effect.The photoelectric effect can be explained by assuming that light is made up of quanta, and that when a photon of a certain energy arrives on a metal surface, it emits photoelectrons.

The emission of conduction electrons from ordinary metals requires a few electron-volt (eV) light quanta, which are comparable to short-wavelength visible or ultraviolet light.Hence, from the above data we can conclude that Photoelectric effect can be explained by assuming that light Consist of quanta.

So, the correct option is B.

Note: The photoelectric effect is significant because it demonstrates that light may have both wave and particle qualities. It was found that light may be thought of as photons (energy packets) in which each photon interacts with one electron and each photon must have enough energy to eliminate each electron. This explains why, in the initial photoelectric experiment, increasing the light intensity failed to excite the electrons on the metal surface.