Answer: gamma < visible < radio.
- A gamma > visible > radio
- B gamma < visible < radio
- C visible < gamma < radio
- D radio < visible < gamma
Correct answer: B. gamma < visible < radio
Explanation: Wavelength increases as frequency decreases, so gamma rays have the smallest wavelength and radio waves the largest: gamma < visible < radio.
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.