Which of the following is a plausible order-of-magnitude estimate for the wavelength of a gamma-ray photon?

A1x10^-3 m

B1x10^-12 m

C1x10^2 m

D1x10^-6 m

Explanation: Gamma rays occupy the shortest-wavelength, highest-energy part of the electromagnetic spectrum, roughly

10^{-9}

10^{-16}

10^{-12}

m falls within this range, while the other options correspond to infrared, microwave and radio wavelengths respectively.

Derived from ZIMSEC Physics Paper 2, November 2004, Q1

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