Which are characteristics of the speed of light? Check all that apply.

Light is electromagnetic radiation, and in space (a vacuum) it travels at about 3.0 × 10⁸ m/s, so B and C are correct. In many materials, higher-frequency light travels more slowly than lower-frequency light because the material affects different frequencies differently, making E correct. A is wrong because waves such as sound do not all travel at the speed of light, and D is wrong because light’s speed depends on the material it travels through.

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