According to the law of refraction, light passing from air into a piece of glass at an angle of 30 degrees will cause the light to

Answer:

bend toward the normal line

Explanation:

When light passes from a less dense to a more dense substance, (for example passing from air into water), the light is refracted (or bent) towards the normal.   In your question the light is moving from rarer to denser medium

Final answer:

Upon refracting from air to glass, light will bend towards the normal line, reducing the angle of incidence due to the principle of Snell's Law, which governs how light refracts between media. However, the exact refracted angle cannot be determined without the refractive indices of air and glass.

Explanation:

According to the Law of Refraction, also known as Snell's Law, light changes direction when it passes from one medium to another due to a change in speed, which is determined by the mediums' refractive indices. When light passes from air (a medium with a lower refractive index) into glass (a medium with a higher refractive index), it bends towards the normal line, the imaginary line perpendicular to the surface at the point of incidence.

Given that the angle of incidence is 30 degrees, following the formula of Snell's law: n₁ sin θ₁ = n₂ sin θ₂ where  n₁ and n₂ are the refractive indices of air and glass, and θ₁ and θ₂ are the angles of incidence and refraction, we could solve for θ₂ which will be the angle of refraction in glass. However without information of refractive indices of air and glass, an exact angle cannot be determined.

In summary, the light ray will bend towards the normal upon entering the glass, hence decreasing the angle of incidence, according to the Law of Refraction or Snell's Law.

Learn more about Law of Refraction here:

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