When a light ray passes through from air to water with a non-zero angle the ray will be

When light travels from a rarer medium (air, refractive index ≈ 1.00) to a denser medium (water, refractive index ≈ 1.33), it slows down and bends towards the normal. This follows Snell's law: n₁ sin θ₁ = n₂ sin θ₂. Since n₂ > n₁, sin θ₂ < sin θ₁, meaning the angle of refraction is smaller than the angle of incidence, which means the ray bends towards the normal. This is the standard behavior of light entering a denser medium.