Question

When a light beam approaches you, its frequency is higher, and its wavelength is shorter. Does this contradict the postulate that speed of light cannot change? discuss.

Answer 1

No. Frequency and speed are completely unrelated concepts. How frequently something occurs is not the same as how quickly. In the universe, at least in the four dimensions that we can understand, there is a speed limit set by the speed of light.

What is Frequency?

The frequency of a repeated event is its number of instances per unit of time. In some cases, it is also referred to as temporal frequency or ordinary frequency to emphasize differences with spatial and angular frequencies, respectively. In physics, frequency is the number of waves that pass a fixed point in a unit of time as well as the number of cycles or vibrations that a body in periodic motion experiences in a unit of time. The pace of direction changes in current per second is known as frequency. It is expressed in hertz (Hz), a unit of measurement that is used internationally. One hertz is equivalent to one cycle per second. A cycle is one whole alternating current wave.

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