1. What is the Photon Energy Equation?

The photon energy equation (E = h × f) calculates the energy of a photon based on its frequency, where h is Planck's constant (6.626 × 10⁻³⁴ J·s) and f is the frequency in hertz (Hz).

2. How Does the Calculator Work?

The calculator uses the photon energy equation:

Where:

• \( E \) — Energy in joules (J)
• \( h \) — Planck's constant (6.626 × 10⁻³⁴ J·s)
• \( f \) — Frequency in hertz (Hz)

Explanation: The equation shows the direct proportionality between a photon's energy and its frequency, with Planck's constant as the proportionality factor.

3. Importance of Photon Energy Calculation

Details: Calculating photon energy is essential in quantum mechanics, spectroscopy, photochemistry, and understanding light-matter interactions across various scientific disciplines.

4. Using the Calculator

Tips: Enter the frequency in hertz (Hz). The value must be positive and greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is Planck's constant?
A: Planck's constant (6.626 × 10⁻³⁴ J·s) is a fundamental physical constant that relates the energy of a photon to its frequency.

Q2: Can I calculate energy using wavelength instead?
A: Yes, using the equation E = h × c / λ, where c is the speed of light and λ is the wavelength.

Q3: What are typical energy values for photons?
A: Photon energies range from about 10⁻²⁵ J for radio waves to 10⁻¹⁵ J for gamma rays, depending on frequency.

Q4: Why is photon energy important?
A: Photon energy determines many properties including chemical reactivity, penetration ability, and interaction with matter.

Q5: Are there limitations to this equation?
A: This equation applies to individual photons in vacuum and may need adjustments for specific material interactions or relativistic effects.