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Photoelectric equation
KE_max = hf − φ = eV₀
Where: KEₘₐₓ = Photoelectric equation, f = frequency (Hz) / focal length (m), h = height (m) / Planck constant, φ = work function (J) / phase (rad)
Solved example
Given: f = 7, h = 5, phi = 10
Find: KE_max_ (Photoelectric equation)
- Formula: KEₘₐₓ = f·h - φ
- Substitute the values: KEₘₐₓ = -10 + 5·7
- Result: KEₘₐₓ = 25
Answer: KE_max_ = 25
Calculator
How to calculate Photoelectric equation
- Write down the formula: KE_max = hf − φ = eV₀.
- Note the known values (f, h, φ).
- Substitute them and simplify to find KE_max_.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Photoelectric equation?
The formula is KE_max = hf − φ = eV₀, where KEₘₐₓ = Photoelectric equation, f = frequency (Hz) / focal length (m), h = height (m) / Planck constant, φ = work function (J) / phase (rad).
What is Photoelectric equation when f = 7, h = 5, phi = 10?
KE_max_ = 25. Substitute the values into KE_max = hf − φ = eV₀ and simplify.