CAPE Physics Unit 1 · 2011 · Paper 1 · Question Q23

A communication satellite sends information to Earth in the form of electromagnetic waves in bursts of 5\text{ ms} duration. If the wavelength of the electromagnetic waves is 2 \times 10^{-6}\text{ m}, the number of wavelengths in EACH pulse is approximately

1. (A)7.5 \times 10^8
2. (B)7.5 \times 10^{11}
3. (C)3 \times 10^{16}
4. (D)3 \times 10^{19}