Answer: Less than 0.01 nm (< 10⁻² nm).
- A Less than 0.01 nm (< 10⁻² nm)
- B 1-10 nm, typical of soft X-rays instead
- C 100-400 nm, typical of ultraviolet light instead
- D 0.01-10 m, typical of radio waves instead
Correct answer: A. Less than 0.01 nm (< 10⁻² nm)
Explanation: Gamma rays: λ < 0.01 nm (10 pm). X-rays: 0.01-10 nm. UV: 10-400 nm. Visible: 400-700 nm. IR: 700 nm-1 mm. Microwaves: 1 mm-0.1 m. Radio: > 0.1 m.
In an electromagnetic wave, the oscillating electric field (E) and magnetic field (B) are perpendicular to each other and to the direction the wave travels - a purely transverse wave that needs no medium, unlike sound.
Concept context
Maxwell's equations, EM spectrum, properties, and applications of each band.