Here's why:
* Slower Medium: When light enters a denser medium (like going from air to water), it slows down.
* Snell's Law: Snell's Law describes the relationship between angles of incidence and refraction: n₁sinθ₁ = n₂sinθ₂.
* n₁ and n₂ are the refractive indices of the two mediums.
* θ₁ is the angle of incidence.
* θ₂ is the angle of refraction.
* Refractive Index: A denser medium has a higher refractive index (n).
* The Result: Since n₂ is greater than n₁, for the equation to hold true, sinθ₂ must be smaller than sinθ₁. This means the angle of refraction (θ₂) is smaller than the angle of incidence (θ₁).
In simpler terms: The light bends towards the normal (an imaginary line perpendicular to the surface) as it slows down.
