Final answer:
Light will experience the least refraction when it travels from air to air.
Step-by-step explanation:
The scenario in which light will experience the least refraction is when it travels from air to air. Refraction occurs when light travels from one medium to another with a different refractive index. Since the refractive index of air is approximately 1.00, which is almost the same as that of air (1.0003), there will be minimal deviation or bending of light in this scenario.
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