Question
If a light ray passes from glass into air, what will happen to its speed? It will slow down It will speed up No change
Answer
4.1
(399 Votes)
Queen
Professional · Tutor for 6 years
Answer
It will speed up
Explanation
## Step 1: Understanding the problemThe question is about the behavior of light as it moves from one medium to another. Specifically, it asks what happens to the speed of light when it moves from glass to air.## Step 2: Understanding the concept of refractive indexThe speed of light is influenced by the medium it travels through. This is due to a property called the refractive index of the medium, which measures how much a ray of light bends when it enters that medium.## Step 3: Applying the concept to the problemIn general, light travels slower in denser substances and faster in less dense substances. Glass is denser than air, hence has a higher refractive index. Therefore, when light moves from glass to air, it speeds up.