X-rays are electromagnetic waves. Fig. 6.1 places X-rays within the electromagnetic spectrum in order of increasing wavelength.
Fig. 6.1 shows, from left to right: gamma-rays, X-rays, J, K, microwaves, L, with visible light indicated between J and K. An arrow shows wavelength increasing.
(a(i))[2]
The three unlabeled parts of the spectrum are marked J, K and L. State the names of these three parts.
J ................................................
K ................................................
L ................................................
(a(ii))[1]
State which one of these three components has the smallest frequency.
(b)[3]
Calculate the frequency of X-rays with wavelength $1.2 \times 10^{-9}\,\text{m}$ in a vacuum.
(c(i))[3]
Describe one medical application of X-rays.
(c(ii))[1]
State one reason safety precautions are needed when X-rays are used.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Ultraviolet, infrared and radio waves have been identified” …