A clean nickel surface is exposed to light with a wavelength of 245 nm . The photoelectric work function for nickel is 5.10 eV .

What is the maximum speed of the photoelectrons emitted from this surface?

The maximum speed of the electron emitted from the metal surface is .

The given parameters;

The energy of the incident light is calculated as follows;

The kinetic energy of the electron emitted from the metal surface is calculated as follows;

The speed of the electron is calculated as;

Thus, the maximum speed of the electron emitted from the metal surface is .

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Explanation:

We are given that

Wavelength=

Work function=

We have to find the maximum speed of photo-electrons emitted from this surface.

Mass of electron,m=

We know that

Where

Using the formula

f=ma newton

f=100x2.5=250n