Question

Which of the following statements is correct concerning the passage of white light into a glass prism?

• A. All the colours of white light travel with the same speed
• B. The violet colour travels slower than the red colour
• C. The violet colour travels faster than the red colour
• D. Greater the wavelength, slower the speed of colour

Answer 1

The correct option is B The violet colour travels slower than the red colour

Violet colour shows more deviation as slower light shows more deviation. Hence, violet is slower than red. Red deviates less and violet deviates more.