Human eyes are most sensitive to the wavelength of

Options

A. 4500 Å
B. 5500 Å
C. 6500 Å
D. Equally sensitive for all wavelengths of visible spectrum

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the wavelength to which the human eye is most sensitive.

2. **Identifying the Visible Spectrum**: The visible spectrum for human eyes ranges from approximately 400 nanometers (nm) to 700 nm. This range corresponds to different colors of light:
- 400 nm is associated with violet light,
- 450 nm with blue light,
- 500 nm with green light,
- 600 nm with orange light, and
- 700 nm with red light.

3. **Finding the Most Sensitive Wavelength**: Research and studies indicate that the human eye is most sensitive to light in the green region of the spectrum. This sensitivity peak occurs around 555 nm.

4. **Converting Wavelength to Angstroms**: Since the options provided are in angstroms, we need to convert 555 nm to angstroms.
- 1 nm = 10 angstroms, therefore:
- 555 nm = 5550 angstroms.

5. **Evaluating the Options**: The options given are:
- 4500 angstroms
- 5500 angstroms
- 6500 angstroms
- Equally sensitive for all wavelengths of the visible spectrum.

Since we calculated that the most sensitive wavelength is approximately 5550 angstroms, option B (5500 angstroms) is the closest match.

6. **Conclusion**: Therefore, the correct answer is that human eyes are most sensitive to the wavelength of approximately 5500 angstroms.

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