Human eye can detect electromagnetic radiations in

The correct answer is Option (1) → a small range of wavelengths of electromagnetic spectrum.

The human eye responds only to visible light, wavelengths from about 400 nm to 700 nm. The electromagnetic spectrum runs from gamma rays (below \( 10^{-12} \) m) to radio waves (metres to kilometres), so the visible band is a very small part of it.

NCERT (2026-27):
Introduction – “Nature has endowed the human eye (retina) with the sensitivity to detect electromagnetic waves within a small range of the electromagnetic spectrum. Electromagnetic radiation belonging to this region of the spectrum (wavelength of about 400 nm to 750 nm) is called light.”