Which type of electromagnetic radiation has the lowest frequency?

• A. Gamma rays
• B. Infrared radiation
• C. Ultraviolet light
• D. Radio waves

Answer: (D)

Verified step by step guidance

1. Recall that electromagnetic radiation spans a wide range of frequencies and wavelengths, arranged in the electromagnetic spectrum.
2. Understand that frequency (\( f \)) and wavelength (\( \lambda \)) are inversely related by the equation: \[ f = \frac{c}{\lambda} \] where \( c \) is the speed of light (approximately \( 3.00 \times 10^{8} \, m/s \)).
3. Identify the types of electromagnetic radiation listed and their typical frequency ranges: - Gamma rays: very high frequency - Ultraviolet light: high frequency but less than gamma rays - Infrared radiation: lower frequency than visible light - Radio waves: lowest frequency among common electromagnetic waves
4. Compare the frequencies of the given options, noting that radio waves have the longest wavelengths and therefore the lowest frequencies.
5. Conclude that among the options provided, radio waves have the lowest frequency because frequency decreases as wavelength increases, and radio waves have the longest wavelengths.