Why is there a path difference of pi between reflected and refracted ray?
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it is because reflection is the bouncing of off the light but in refraction light separated two mediums
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✯ Reflection ✯
- ➷ The bouncing back of light is called reflection.
- ➷ It involves only a single medium.
- ➷ After reflection, only change in direction takes place.
✯ Refraction ✯
- ➷ The phenomenon of bending of light is called refraction.
- ➷ It involves two or more than two media.
- ➷ After refraction, changes in direction and velocity take place.
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