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

Let us analyze the two statements:

Statement (A): In VIBGYOR, wavelength increases from violet to red. This statement is correct. In the visible spectrum (VIBGYOR: Violet, Indigo, Blue, Green, Yellow, Orange, Red), the wavelength of light increases as we move from violet (shortest wavelength) to red (longest wavelength).

Statement (B): In VIBGYOR, refractive index increases from violet to red. This statement is incorrect. The refractive index of a medium depends on the wavelength of light, and it decreases as the wavelength increases. Since violet light has a shorter wavelength than red light, the refractive index is higher for violet light and lower for red light.

Final Answer: The correct answer is \( \mathbf{\text{(A) only}} \).