A narrow beam containing red and violet light enters a glass prism from air. The two colours have the same angle of incidence. Violet light travels more slowly than red light inside this glass.
Which statement describes the colours just after entering the glass?
Violet bends less towards the normal; both frequencies remain unchanged.
Violet bends more towards the normal; both frequencies decrease.
Violet bends less towards the normal; both frequencies decrease.
Violet bends more towards the normal; both frequencies remain unchanged.
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.