Question

What is the wavelength of the visible spectrum?

• A. 8500 - 9800 angstrom
• B. 7800 - 8000 angstrom
• C. 3900 - 7600 angstrom
• D. 1300 - 3000 angstrom

Hint:

The visible spectrum is a small part of the entire electromagnetic spectrum. It is the range of wavelengths that the human eye can detect, and it corresponds to the colors of the rainbow.

Answer 1

The Correct Option is C

The visible spectrum refers to the portion of the electromagnetic spectrum that is visible to the human eye. This range of wavelengths is what we commonly refer to as light. The question asks about the wavelength range of the visible spectrum. Let's analyze the options one by one.

1. 8500 - 9800 angstrom: This range is too high to be in the visible spectrum. It falls into the infrared region, which is not visible to the naked eye.
2. 7800 - 8000 angstrom: This range is also outside of the visible spectrum and, like the previous option, it falls into the infrared range.
3. 3900 - 7600 angstrom: This is the correct range for the visible spectrum. Typically, the visible spectrum ranges from approximately 4000 angstroms to 7500 angstroms (400 nm to 750 nm). Therefore, this option fits within the generally accepted visible spectrum range.
4. 1300 - 3000 angstrom: This range corresponds to the ultraviolet region, which is also invisible to the human eye.

Therefore, the correct answer is 3900 - 7600 angstrom. The visible spectrum typically covers wavelengths from about 4000 angstroms to 7500 angstroms.