The ray of light appears to diverge from the principal focus located on the same side of the lens.
How does a ray of light behave after refraction through a concave lens when it is parallel to the principal axis?
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The ray of light appears to diverge from the principal focus located on the same side of the lens.
When a ray of light is parallel to the principal axis and passes through a concave lens, it diverges after refraction. In other words, the ray of light bends away from the principal axis as it passes through the concave lens. Concave lenses are thinner in the center and thicker at the edges, causing light rays to spread out. This divergence is a characteristic behavior of concave lenses, and it is different from the converging behavior exhibited by convex lenses.
After refraction through a concave lens, a ray of light parallel to the principal axis diverges as if coming from a virtual focal point on the same side as the incident light. The concave shape of the lens causes the light to refract away from the principal axis, resulting in the apparent divergence of parallel rays. This behavior is due to the transition from a denser medium (lens) to a less dense medium (air). The virtual focal point represents the point from which the divergent rays appear to originate, and this property is utilized in correcting nearsightedness in corrective eyeglasses.