Question

Violet, green, red and yellow are the four colours formed on a white screen when a polychromatic light is dispersed. The arrangement of colours in the decreasing order of wavelengths is:

विकल्प

• green, red, yellow and violet

• red, yellow, green and violet

• violet, green, yellow and red

• violet, green, red and yellow

Answer 1

Red, yellow, green and violet

Explanation:

Wavelength decreases in the order red, yellow, green and violet. Violet has the shortest wavelength among these colours.