Question

___________ of electromagnetic radiation is visible to the human eye.

all
a narrow portion
the white color
the dark color

Explanation:

Analyze the electromagnetic spectrum

The electromagnetic spectrum spans a vast range of wavelengths, from extremely short gamma rays to extremely long radio waves.

Identify the visible range

Human photoreceptors in the eye are only sensitive to wavelengths roughly between \(380\text{ nm}\) and \(750\text{ nm}\). This visible light spectrum represents only a tiny, narrow fraction of the entire electromagnetic spectrum.

Answer:

• All
• A narrow portion (Correct answer)
• The white color
• The dark color