A beam of light is traveling through a medium at 200,000km/s It enters a different medium and speeds up , to almost 250,000km/s Finally, it enters a third medium and halts. What were the media the light traveled through, in order? liquid, opaque solid, gas opaque solid, gas, liquid gas, liquid, opaque solid liquid, gas, opaque solid

## Step 1<br />The speed of light varies depending on the medium it travels through. The speed of light is highest in a vacuum, followed by gases, liquids, and solids. The speed of light is lowest in opaque solids.<br /><br />## Step 2<br />In the given problem, the light beam is traveling at a speed of 200,000 km/s in the first medium. This speed is less than the speed of light in a vacuum but more than the speed of light in a gas.<br /><br />## Step 3<br />In the second medium, the light beam speeds up to almost 250,000 km/s. This speed is higher than the speed of light in a liquid but less than the speed of light in a gas.<br /><br />## Step 4<br />In the third medium, the light beam comes to a halt. This indicates that the medium is an opaque solid, where light cannot pass through.