How can we make a ray of light bend toward the normal? We can make it travel from glass into air We can make it travel from air into glass We can make it travel through water We can make it travel through glass

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To make a ray of light bend **toward the normal**, you need to have the light enter a medium with a **higher refractive index** from a medium with a **lower refractive index**. This causes the light to slow down and bend towards the normal line (an imaginary line perpendicular to the surface at the point of incidence).

**Here's how the options apply:**

1. **Travel from glass into air**  
   - **Incorrect.** Glass has a higher refractive index than air. When light travels from glass to air, it moves from a medium with a higher refractive index to one with a lower refractive index, causing it to bend **away from the normal**.

2. **Travel from air into glass**  
   - **Correct.** Air has a lower refractive index than glass. When light enters glass from air, it slows down and bends **toward the normal**.

3. **Travel through water**  
   - **Correct (assuming the light is entering water from air).** Water has a higher refractive index than air. When light travels from air into water, it bends **toward the normal**.

4. **Travel through glass**  
   - **Depends on the initial medium.** If the light is entering glass from a medium with a lower refractive index (like air), it will bend **toward the normal**. However, if it's traveling within glass or entering from a medium with the same or higher refractive index, there may be no bending or bending away from the normal.

**Summary:**  
To bend toward the normal, have light travel **from air into glass** or **from air into water**.

**Visual Representation:**

![Refraction Diagram](https://upload.wikimedia.org/wikipedia/commons/thumb/9/98/Refraction_at_glass_air_interface.svg/400px-Refraction_at_glass_air_interface.svg.png)

*In the diagram above, light bends toward the normal when entering the glass from air.*
To make a ray of light bend toward the normal, the light must travel from a medium with a lower refractive index to one with a higher refractive index. This happens when light moves from **air into glass** or **air into water**.

How can we make a ray of light bend toward the normal? We can make it travel from glass into air We can make it travel from air into glass We can make it travel through water We can make it travel through glass

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