Question

lasers are pointed at different containers filled with water, oil, and air. the speed of the laser changes based on the container. what explanation best accounts for this observation? the color of the containers alters the speed of light the temperature of the materials solely affects the speed of light light waves move at different speeds through different materials light waves move at the same speed in all materials

Explanation:

Step1: Analyze each option

• Option 1: The color of the container has no relation to the speed of light. Light speed in a medium depends on the medium's properties, not the container's color.
• Option 2: While temperature can have a minor effect on the refractive index (and thus light speed) in some cases, it's not the sole factor here. The main factor is the type of material (water, oil, air).
• Option 3: Light waves do move at different speeds through different materials. The refractive index \(n=\frac{c}{v}\) (where \(c\) is the speed of light in vacuum and \(v\) is the speed of light in the medium) varies for different materials (e.g., \(n_{air}\approx1\), \(n_{water}\approx1.33\), \(n_{oil}\approx1.47\)). So \(v = \frac{c}{n}\) will be different for different \(n\).
• Option 4: Light waves do not move at the same speed in all materials. As shown by the refractive index formula, different materials have different refractive indices, so different speeds of light.

Answer:

Light waves move at different speeds through different materials.