Photoelectric Effect Calculator

Photoelectric Effect Energy (joules):



Planck’s constant is a fundamental constant in physics, denoted as ‘h,’ which plays a pivotal role in understanding the behavior of subatomic particles, particularly in the context of the photoelectric effect. This constant was introduced by Max Planck in 1900 and is a cornerstone in quantum mechanics. In this guide, we will delve into the concept of Planck’s constant, its relevance to the photoelectric effect, and how to calculate energy using the formula E=h*v.

How to Use

To use the Photoelectric Effect Calculator, simply enter the values for the frequency (in Hz) and let the calculator do the rest. It will instantly calculate the Photoelectric Effect Energy in joules using the formula E=h*v.


The formula for calculating Photoelectric Effect Energy (E) is:

E = h * v


  • E represents the energy (in joules).
  • h is Planck’s constant (approximately 6.626 x 10^-34 Js).
  • v stands for the frequency of the incident light (in Hz).


Let’s illustrate how to use the formula with an example:

Suppose the frequency of incident light is 5 x 10^14 Hz. Using Planck’s constant (h = 6.626 x 10^-34 Js), we can calculate the Photoelectric Effect Energy (E):

E = 6.626 x 10^-34 Js * 5 x 10^14 Hz E ≈ 3.313 x 10^-19 Joules

So, the Photoelectric Effect Energy is approximately 3.313 x 10^-19 Joules.

Frequently Asked Questions (FAQs)

Q1: What is Planck’s constant?

A1: Planck’s constant (denoted as ‘h’) is a fundamental constant in physics, representing the smallest indivisible unit of energy in quantum mechanics.

Q2: What is the photoelectric effect?

A2: The photoelectric effect is a phenomenon in which electrons are emitted from a material’s surface when exposed to light. It played a crucial role in establishing the quantum theory of light.

Q3: How is Planck’s constant related to the photoelectric effect?

A3: Planck’s constant is used in the formula E=h*v to calculate the energy of photons, which is essential in understanding the photoelectric effect.

Q4: Why is the Photoelectric Effect Calculator useful?

A4: The calculator simplifies the calculation of energy in the photoelectric effect, saving time and ensuring accuracy.


Planck’s constant is a fundamental constant in physics, and it plays a critical role in explaining the photoelectric effect. By using the formula E=h*v, you can easily calculate the energy associated with photons. Whether you’re a student or a researcher, understanding these concepts is essential for comprehending the behavior of light and matter at the quantum level.

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