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Speed of Light Equation:
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The speed of light equation (c = f × λ) relates the speed of light to its frequency and wavelength. This fundamental equation in physics describes the relationship between these three important properties of electromagnetic waves.
The calculator uses the speed of light equation:
Where:
Explanation: The equation shows that the speed of light equals the product of its frequency and wavelength. In vacuum, this value is constant at approximately 299,792,458 m/s.
Details: Calculating the speed of light is fundamental in physics, optics, telecommunications, and many engineering applications. It helps in understanding wave properties, designing communication systems, and studying electromagnetic phenomena.
Tips: Enter frequency in Hertz (Hz) and wavelength in meters (m). Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the constant value of speed of light in vacuum?
A: The speed of light in vacuum is exactly 299,792,458 meters per second, which is a fundamental physical constant.
Q2: How does medium affect the speed of light?
A: Light travels slower in materials other than vacuum. The speed reduction is described by the refractive index of the material.
Q3: What's the relationship between frequency and wavelength?
A: Frequency and wavelength are inversely proportional when speed is constant. Higher frequency means shorter wavelength, and vice versa.
Q4: Can this equation be used for all electromagnetic waves?
A: Yes, the equation c = f × λ applies to all electromagnetic waves, from radio waves to gamma rays.
Q5: Why is the speed of light considered a universal constant?
A: According to Einstein's theory of relativity, the speed of light in vacuum is the same for all observers, regardless of their relative motion.