THE ANGLE OF DEVIATION OF LIGHT OF VARIOUS COLOURS PASSING THROUGH A TRIANGULAR PRISM INCREASES IN THE ORDER

• A. red → green → blue ✓
• B. green → violet → blue
• C. blue → red → green
• D. blue → green → red

The answer to the question is: A. red → green → blue

When light passes through a triangular prism, it undergoes dispersion, which causes the different colors of light to separate due to their varying wavelengths. This phenomenon is a result of the different refractive indices of the prism for different colors of light. The angle of deviation of light through a prism increases in the order of decreasing wavelength, which corresponds to increasing frequency and energy. Therefore, the correct order for the angle of deviation of light passing through a triangular prism is from the longest wavelength to the shortest wavelength, which corresponds to the colors red, green, and blue.

The correct sequence for the angle of deviation of light passing through a triangular prism is red → green → blue. This means that red light is deviated the least, followed by green light, and then blue light is deviated the most.