does light travels only in straight line? why?
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Light travels in the straight line because it does not generally interact with the medium and wherever it interacts it does change its path like when it is entering a different medium with different permeability and permittivity(denser or rarer). This interaction and bending of light is called refraction.
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Answer:
No actually light is preferred to travel in both rays and in waves.
When light travels in rays, the process is either caused due to reflection or refraction
But if light is considered to be a wave, then it is called diffraction.
Hope this helps!!
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