Question

How can we make a ray of light bend toward the normal?

we can make it travel through water
we can make it travel through glass
we can make it travel from glass into air
we can make it travel from air into glass

Answer 1

To make a ray of light bend toward the normal, you should have it travel from a medium with a lower refractive index into a medium with a higher refractive index. Among the options you've provided:

- **We can make it travel from air into glass.** (This is correct; the light will bend toward the normal when entering the glass from air, as glass has a higher refractive index than air.)

- **We can make it travel through water.** (This depends on the direction of the light. If light enters water from air, it will bend toward the normal.)

- **We can make it travel through glass.** (This is irrelevant since there is no change in medium; bending occurs at the interface of different media.)

- **We can make it travel from glass into air.** (This would make the light bend away from the normal, which is not what you're looking for.)

So, the best answer to your question is **"We can make it travel from air into glass."**