Question

All colours travel with the same speed in :

• A. Vaccum
• B. Glass
• C. Water
• D. All of the above

Answer 1

The correct option is A Vaccum

$\begin{array}{c}\text{All colours travel with the same speed.}\\ \text{in vaccum}\\ \text{speed}=3\times {10}^{8}m/s\\ \text{Hence option}A\text{is correct.}\end{array}$