Question

Observe the given ray diagram showing refraction through a prism and choose the correct option for colour of rays 1 and 2:

Options

• Colour of ray 1 : Blue, Colour of ray 2 : Red

• Colour of ray 1 : Green, Colour of ray 2 : Yellow

• Colour of ray 1 : Red, Colour of ray 2 : Violet

• Colour of ray 1 : Violet, Colour of ray 2 : Red

Answer 1

Colour of ray 1 : Red, Colour of ray 2 : Violet

Explanation:

Different colours of light travel at different speeds in glass, causing them to bend by different amounts. Red light has the longest wavelength and deviates the least (Ray 1), while violet light has the shortest wavelength and deviates the most (Ray 2) toward the base of the prism.