## How do you find the maximum kinetic energy of a photon?

The maximum kinetic energy of a photoelectron is given by 𝐸 = ℎ 𝑐 𝜆 − 𝑊 , m a x where ℎ is the Planck constant, 𝑐 is the speed of light, 𝜆 is the wavelength of the incident photon, and 𝑊 is the work function of the metal surface.

What is the maximum kinetic energy of the ejected photoelectrons?

The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2×1014s−1 is 6.63×10−20J.

### How do you calculate energy of ejected photon?

The energy of each photon is E = hf, where h is Planck’s constant and f is the frequency of the EM radiation. Higher intensity means more photons per unit area. The flashlight emits large numbers of photons of many different frequencies, hence others have energy E′ = hf′, and so on.

What is the kinetic energy of the ejected electron?

Re: How to find the kinetic energy of ejected electrons? Kinetic energy is calculated through the formula KE= 0.5 m*v2, where m is the mass, in this case the ejected electron mass, and v is the velocity which is given in the question.

#### Where is the maximum kinetic energy?

The kinetic energy depends on the mass and the velocity of the object. At equilibrium, the kinetic energy will be maximum because velocity is maximum at this point. When the objects move faster than the objects have the highest kinetic energy.

What is the kinetic energy of a photon?

Kinetic Energy – This is the energy of the light due to its motion. Note that because a photon has no mass, its kinetic energy equals its total energy.

## What is maximum kinetic energy in photoelectric effect?

The maximum kinetic energy of a photoelectron at the metal surface is the difference between the energy of the incident photon and the work function of the metal. The work function is the binding energy of electrons to the metal surface.

How do you find the maximum kinetic energy of an object?

To calculate kinetic energy:

1. Find the square of the velocity of the object.
2. Multiply this square by the mass of the object.
3. The product is the kinetic energy of the object.

### How do you calculate electrons ejected?

1. Find the total amount of energy carried by an individual photon with E = hf. (
2. Compare this value to the work function.
3. If E (photon) < Work Function then NO electrons are emitted.
4. If E (photon) = or > Work Function then the number of electrons emitted is equal to the number of photons colliding.

How do you find the kinetic energy of an electron?

Re: Kinetic Energy of Electrons [ENDORSED] Therefore, we calculate the kinetic energy using the equation E(photon) = E(threshold) + KE. Then, we can use the equation for kinetic energy (KE = 1/2 mv2) and substituting in the mass of an electron (9.11 x 10-31 kg), we can calculate the velocity for the single electron.

#### How do I calculate kinetic energy?

If you know the mass and velocity of an object, use the kinetic energy calculator to find it’s energy in movement….To calculate kinetic energy:

1. Find the square of the velocity of the object.
2. Multiply this square by the mass of the object.
3. The product is the kinetic energy of the object.

Where is maximum kinetic energy?