(a)[1]
Using the direction of propagation of energy, state what is meant by a transverse wave.
(b)[1]
A space telescope has been built to detect electromagnetic radiation with wavelengths from $12\,\mu\text{m}$ to $28\,\mu\text{m}$.\n\nState the region of the electromagnetic spectrum for this radiation.
(c)[3]
Another space telescope has a detector that receives an electromagnetic wave. The detector’s signal is sent to Earth and shown on an oscilloscope as in Fig. 5.1. The frequency of the oscilloscope trace is the same as the frequency of the detected electromagnetic wave.\n\nThe time-base setting on the oscilloscope is $5.0 \times 10^{-15}\,\text{s cm}^{-1}$.\n\nCalculate the wavelength of the detected electromagnetic wave.