Question

Pick the correct answer from the following two statements :
(a) In VIBGYOR, wavelength increases from violet to red.
(b) In VIBGYOR, refractive index increases from violet to red. 

• A. Only (a) is true
• B. Only (b) is true
• C. Both (a) and (b) are true
• D. Both (a) and (b) are false

Answer 1

The Correct Option is A

In the VIBGYOR spectrum (visible light spectrum), the wavelength indeed increases from violet to red, which is true. Violet light has the shortest wavelength, while red light has the longest wavelength.
However, the refractive index generally decreases with increasing wavelength in most media. This means that the refractive index is higher for violet light and lower for red light.

The correct option is (A): Only (a) is true