Question

Why does the colour violet deviate the most and the colour red the least when white light passes through a triangular prism?

• A. The colour violet has the longest wavelength, and the colour red has the shortest wavelength
• B. Both violet and red have the same wavelength
• C. None of the above
• D. The colour violet has the shortest wavelength, and the colour red has the longest wavelength.

Answer 1

The correct option is D The colour violet has the shortest wavelength, and the colour red has the longest wavelength.

Because the colour violet has the shortest wavelength and less speed and the colour red has the longest wavelength and more speed due to this reason violet colour has most deviate and red colour has least deviate