(a(i))[1]
State the wavelength, in $\text{m}$, for the wave.
(a(ii))[2]
Calculate the frequency, in $\text{THz}$, of the wave.
(a(iii))[1]
State the name of the part of the electromagnetic spectrum that includes this wave.
(b)[2]
A current $I$ in a coil of wire creates a magnetic field. The energy $E$ stored in that magnetic field is given by $E = \frac{I^2 L}{2}$, where $L$ is a constant. The coil manufacturer states that $L$, in SI base units, is $7.5 \times 10^{-6} \pm 5\%$. The current $I$ in the coil is measured as $(0.50 \pm 0.02)\,\text{A}$. These values of $L$ and $I$ are then used to work out $E$. Determine the percentage uncertainty in the value of $E$.