A student traces a rectangular glass block and marks the incident and emergent rays on paper. The student then moves the block before marking where the rays crossed its surfaces.
Which action would produce a valid ray diagram?
Join the ray marks to the centre of the original outline.
Measure all the angles from the edges of the moved block.
Move the original outline so that it touches the ray marks.
Repeat the tracing and mark the crossing points before moving the block.
84 exam-style questions on Edexcel GCSE Physics 5.2 The electromagnetic spectrum, covering 5.2.1 Electromagnetic waves and refraction in glass (core practical), 5.2.2 Groups of the electromagnetic spectrum, 5.2.3 Wavelength-dependent behaviour of EM waves, and 5.2.4 Velocities of EM waves in different substances. Each one has a worked solution and a mark scheme showing where the marks go.