Physics 0625 · IGCSE · General properties of waves
General properties of waves — practice question
Fig. 7.1 shows a scale drawing of light waves moving towards a narrow slit. SCALE $1.0\,\text{cm} : 4.0 \times 10^{-7}\,\text{m}$. The diagram marks the direction of propagation of light, the crests of 3 successive wavefronts, and a barrier containing a narrow slit.
(a(i))[1]
What wave effect is produced by the narrow slit?
(a(ii))[2]
Using Fig. 7.1, work out the wavelength of the light. Give your answer to two significant figures.
(a(iii))[3]
On Fig. 7.1, draw three wavefronts after they have passed through the narrow slit.
(b(i))[2]
Show that the wavelength of the sound is about $0.9\,\text{m}$. State any equation you use in words or symbols.
(b(ii))[2]
Calculate how long sound takes to travel from the foghorn to the ship.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “diffraction effect” …