alleryStart learning →At a non-normal incident angle, the light ray bends closer to the perpendicular in which substance?
AThe warmer of the two
BThe optically slower one
CThe optically faster one
DThe denser coloured one
Answer & Solution
Correct answer: B. The optically slower one
1. Bending direction depends on the speed of light in each medium.
2. Light changes speed when it crosses between media.
3. At a non-normal incident angle, the path of the light ray bends.
4. It bends closer to the perpendicular in the optically slower substance.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 25 'Geometric Optics', sections 25.1-25.7_
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