Question

A thin beam of white light falls on a face of a glass prism and a spectrum is obtained on a screen. Which of the following options is the correct sequence of colours from top to bottom on the screen?

Options

• Red, Green, Yellow, Violet, Blue

• Red, Yellow, Green, Blue, Violet

• Violet, Blue, Green, Yellow, Red

• Violet, Red, Green, Yellow, Blue

Answer 1

Red, Yellow, Green, Blue, Violet

Explanation:

When white light passes through a glass prism, it undergoes dispersion, splitting into its constituent colours based on wavelength. Red light has the longest wavelength and bends the least, appearing at the top, while violet has the shortest wavelength and bends the most, appearing at the bottom.