Indigo and red regions of VIBGYOR, respectively fall in the range of wavelenght

Options

A. 430-470nm and 660-760nm
B. 300-390 nm and 600-650 nm
C. 390-760 nm and 430-470nm
D. 660-760 nm and 430-470nm

Explanation

To determine the wavelength ranges for the indigo and red regions of the VIBGYOR spectrum, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the VIBGYOR Spectrum**: VIBGYOR stands for Violet, Indigo, Blue, Green, Yellow, Orange, and Red. Each color corresponds to a specific range of wavelengths in nanometers (nm).

2. **Identify the Wavelength Ranges**:
- **Violet**: Approximately 400 nm
- **Indigo**: Approximately 425 nm
- **Blue**: Approximately 470 nm
- **Green**: Approximately 550 nm
- **Yellow**: Approximately 600 nm
- **Orange**: Approximately 630 nm
- **Red**: Approximately 665 nm

3. **Determine the Ranges for Indigo and Red**:
- **Indigo** falls in the range of approximately 425 nm to 470 nm.
- **Red** falls in the range of approximately 660 nm to 760 nm.

4. **Match the Ranges with Given Options**:
- The options provided are:
- A) 430 to 470 nm and 660 to 760 nm
- B) 300 to 390 nm and 600 to 650 nm
- C) 390 to 760 nm
- D) 430 to 470 nm and 660 to 760 nm
- From our findings, the ranges for indigo and red correspond to option A: 430 to 470 nm for indigo and 660 to 760 nm for red.

5. **Conclusion**: The correct answer is option A, which states that the indigo and red regions of VIBGYOR fall in the ranges of 430 to 470 nm and 660 to 760 nm, respectively.