Question

part a: electromagnetic waves
wave speed
medium light wave sound wave
wood 0 km/s 5.000 km/s
water 226,000 km/s 1.480 km/s
helium 299,000 km/s 1.007 km/s
vacuum chamber 300,000 km/s 0 km/s

1. in which medium does light travel through fastest?

which state of matter is this?

Explanation:

Step1: Compare light - wave speeds

We look at the speeds of light waves in different media: 0 km/s in wood, 226,000 km/s in water, 299,000 km/s in helium, and 300,000 km/s in a vacuum chamber.

Step2: Identify the fastest medium

The highest speed is 300,000 km/s, which is in a vacuum chamber. A vacuum is not a state of matter (solid, liquid, gas), but an empty space with no matter present.

Answer:

Light travels fastest in a vacuum chamber. It is not a state of matter.