Electromagnetic Spectrum Wavelength Ranges

Steps:

• Gamma rays: <10^{-10} m.
• X-rays: 10^{-9} m to 10^{-8} m.
• Ultraviolet: 10^{-8} m to 4×10^{-7} m.
• Microwaves: 10^{-1} m to 1 m.
• Match each option's wavelength to the appropriate range.

Why C is correct:

• Ultraviolet radiation ranges from 10 nm (10^{-8} m) to 400 nm per standard EM spectrum definitions, so 10^{-8} m fits exactly.

Why the others are wrong:

• A: 10^{-3} m falls in microwave range, far longer than gamma rays (<10^{-10} m).
• B: 10^{-2} m is shorter than microwave range (starts at 10^{-1} m), bordering infrared.
• D: 10^{-10} m is shorter than X-ray range, fitting gamma rays instead.

Final answer: C