A) It requires a material medium for propagation
B) It can travel through vacuum
C) It involves transportation of energy
D) It has finite speed
Correct Answer: A
Solution :
Light waves do not require a material medium for their propagation. Also they travel through vacuum. A metallic plate kept in the path of light rays gets heated up, showing that light involves transportation of energy. Also speed of light is \[3\times {{10}^{8}}\,m/s\]which is constant.
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