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Wavelength does not change with the speed of light, nor does the speed of light change for different wave lengths. Wavelength x frequency = c (the speed of light) always for any given medium through which it travels. Greater wavelength yields lower frequency, so the speed is always the same. Speed changes as light passes into different media transparent to light, but the change in speed has nothing to do with any change in frequency or wavelength. Those are related only to the nature of the material and the particular light energies it may pass or absorb. So white light passing through a red filter emerges red because the blue and green frequencies have been absorbed by the filtering material. That change in wavelength and frequency is not related to any change in speed within the filter.

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Q: Why wavelenth changes with speed of light?
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When the speed of light changes the frequencywavelegnth changes?

The constancy of the speed of light in vacuum is the keystone of relativity. Because of this, the frequency/wavelenth of the light changes relative to the observer when the source is approaching or receding from the observer. That's why there is red shift. Usually, this is explained by analogy to the Doppler effect with sound waves, where the speed of sound is constant and the frequency has to changes as the relative motion changes.


Why call light as E M wave which is not having neither electric nor magnet?

Electromagnetic waves, like light, do involve changes in the electric and the magnetic field. These changes propagate at the speed of light - as a wave.Electromagnetic waves, like light, do involve changes in the electric and the magnetic field. These changes propagate at the speed of light - as a wave.Electromagnetic waves, like light, do involve changes in the electric and the magnetic field. These changes propagate at the speed of light - as a wave.Electromagnetic waves, like light, do involve changes in the electric and the magnetic field. These changes propagate at the speed of light - as a wave.


What do you call it when light the speed of light changes as it passes through different meduims?

Diffraction.


What frequencies of visible light are transmitted through a piece of glass if the glass appears purple?

No wavelenth.


How you calculate the speed of light in water?

Assuming the speed of light in air is already known (it is close to the speed of light in a vacuum), you might check how the light refracts when it changes from air to water (at what angle), and then use Snell's Law.

Related questions

When the speed of light changes the frequencywavelegnth changes?

The constancy of the speed of light in vacuum is the keystone of relativity. Because of this, the frequency/wavelenth of the light changes relative to the observer when the source is approaching or receding from the observer. That's why there is red shift. Usually, this is explained by analogy to the Doppler effect with sound waves, where the speed of sound is constant and the frequency has to changes as the relative motion changes.


How does the wavelenth changes when light travel from ane optical medium to another optical medium?

Diamond (solid)


What is the equation for calculating wave speed?

wave speed= frequency/wavelenth


How do you calculate speed when the frequency and wavelength are given?

speed=frequency x wavelenth xD


Why call light as E M wave which is not having neither electric nor magnet?

Electromagnetic waves, like light, do involve changes in the electric and the magnetic field. These changes propagate at the speed of light - as a wave.Electromagnetic waves, like light, do involve changes in the electric and the magnetic field. These changes propagate at the speed of light - as a wave.Electromagnetic waves, like light, do involve changes in the electric and the magnetic field. These changes propagate at the speed of light - as a wave.Electromagnetic waves, like light, do involve changes in the electric and the magnetic field. These changes propagate at the speed of light - as a wave.


How is refraction linked to light speed?

When light enters a different medium (refracts), its speed changes.


What is constant and never changes?

The speed of light in a vacuum never changes.


When does light undergo refraction?

light undergoes refraction when the matter changes the speed of light


Does the light changes its speed as it reflects back from an object?

No.


How is the speed of light affected as it passes at an angle from air to water?

the speed never changes


Which property of light will change when the medium of propagation changes?

The speed.


What frequencies of visible light are transmitted through a piece of glass if the glass appears purple?

No wavelenth.