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Light Equation:
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The light equation describes the relationship between the speed of light (c), frequency (f), and wavelength (λ). It is a fundamental equation in physics that connects these three important properties of electromagnetic waves.
The calculator uses the light equation:
Where:
Explanation: This equation shows that the speed of light is equal to the product of its frequency and wavelength. For electromagnetic waves in a vacuum, the speed of light is constant at approximately 299,792,458 m/s.
Details: Understanding the relationship between frequency, wavelength, and the speed of light is crucial in fields like optics, telecommunications, astronomy, and quantum mechanics. It helps in designing optical systems, understanding light behavior, and analyzing electromagnetic spectra.
Tips: Enter any two known values to calculate the third unknown value. All values must be positive numbers. The calculator will compute the missing variable based on the equation c = f × λ.
Q1: What is the exact value of the speed of light?
A: The speed of light in a vacuum is exactly 299,792,458 meters per second, which is often approximated as 3.00 × 10⁸ m/s for calculations.
Q2: How are frequency and wavelength related?
A: Frequency and wavelength are inversely proportional. As frequency increases, wavelength decreases, and vice versa, while the speed of light remains constant.
Q3: Does light travel at the same speed in all materials?
A: No, light travels slower in materials other than vacuum. The speed reduction is described by the material's refractive index.
Q4: What is the range of visible light wavelengths?
A: Visible light wavelengths range from approximately 380 nanometers (violet) to 750 nanometers (red).
Q5: Can this equation be used for all electromagnetic waves?
A: Yes, this relationship holds true for all electromagnetic radiation, from radio waves to gamma rays.