A student wants to investigate how thermal energy is conducted through rods of iron, copper, glass and aluminium. Wax is spread over each rod. Fig. 6.1 shows the apparatus used by the student.
(a)[2]
Describe how the student can compare the conduction of thermal energy through the rods in Fig. 6.1.
(b(i))[3]
Calculate the frequency of the infrared waves.
(b(ii))[2]
State the name of a region of the electromagnetic spectrum which has a wavelength longer than the wavelength of infrared. Give one use of the radiation in this region.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Measure/compare how much or how quickly wax melts” …