Question

How does wavelength affect photoelectric effect?

Answer 1

Photoelectric effect:

1. The photoelectric effect is a phenomenon by which electrons can be released from the surface of a metal when it is exposed to light. The electrons released from the metal are known as photoelectrons, and the process is sometimes called photoemission.
2. Photoelectrons are similar to ordinary electrons in terms of their behavior and physical characteristics. Simply put, the prefix photo- informs us that the incident light has expelled electrons from the surface of the metal.

The relation between energy and wavelength:

1. While wavelength and frequency have a connection to light, they also have a connection to energy. Greater energy is correlated with shorter wavelengths and higher frequencies. Therefore, lower energy is produced by longer wavelengths and lower frequencies. $E=h\nu$ is the energy equation.
2. Where $E$ represents energy, $h$ represents Planck's constant $(6.626x{10}^{-34}J·s)$, and $\nu$ represents frequency.
3. Due to the fact that energy grows as frequency rises, there is a direct correlation between the two in the energy equation. The fact that $h$ is a constant makes this conceivable.
4. Hence, the maximum wavelength of incident radiation that causes a photo materials photoelectric emission to totally cease is known as the threshold wavelength. For various materials, the threshold wavelength varies. The speed of the released electrons increases as the threshold wavelength for the particular metal decreases.