SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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both have the same frequency.
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both have the same wavelength.
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both travel at the same speed.
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red light travels faster than violet light.
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Detailed explanation-1: -Explanation: When the red light is compared with the violet light, both travel at the same speed of 3 x m/s. All Electromagnetic Waves travels at the same speed. Red and violet lights are under the group of visible lights thus they travel at the same speed.
Detailed explanation-2: -Red light is faster than violet light because red light have longer wavelength while violet light have shorter wavelength. But this is applicable in all mediums except Vaccum. Answer: The speed of light in vacuum is constant and does not depend on characteristics of the wave (e.g. its frequency, polarization, etc).
Detailed explanation-3: -In a vacuum, red and violet light (=single photons or photon packets) travel at the same speed. Although red light has a lower frequency than violet light, the wavelengths are identical. As a result, at least in a vacuum, the speed of both colors of light is the same.
Detailed explanation-4: -Red light has the longest wavelength and is bent the least. Violet light has the shortest wavelength and is bent the most. Thus violet light travels more slowly through glass than does any other color and red light travels fastest.