Refraction of Waves 3 – Hollms School

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First	First	Last	Quiz Score Total	Question 3	Image 3a	3a) Select the diagram that shows the wavefronts on the peaks of the waves?	Question 3b	Image 3b1	3bi) Select the diagram below that shows what happens to the wavefronts at the boundary?	3bii) Select the statements that apply to the diagram above?	Image 3b2	3biii) Select the diagram below that shows what happens to the wavefronts at the boundary?	3biiii) Select the statements that apply to the diagram above?	Question 3c	Image 3c	3c) Why does the direction not change?	Quiz Percentage Grade
ppefmh	Ed	Garstin	2/6	The diagram below shows transverse waves. All the waves have the same wavelength and speed.			Wavefronts can be used to explain why light rays can change direction when they pass from one medium to another.			When the first wavefront starts to move into the glass, those parts of the wavefront slow down. Those parts of the wavefront now get closer together. The wavelength of the waves decreases. The wave changes direction towards the normal. When the first wavefront starts to move out of the glass, those parts of the wavefront speed up. Those parts of the wavefront now get further apart. The wavelength of the waves increases. The wave changes direction away from the normal.			When the first wavefront starts to move into the glass, those parts of the wavefront slow down. Those parts of the wavefront now get closer together. The wavelength of the waves decreases. The wave changes direction towards the normal. When the first wavefront starts to move out of the glass, those parts of the wavefront speed up. Those parts of the wavefront now get further apart. The wavelength of the waves increases. The wave changes direction away from the normal.	The diagram below shows a light wave passing from one medium to another along the normal.		When wavefronts travel along the normal, the whole wavefront enters the glass at the same time. This means that each part of the wavefront slows down together and the wave does not change direction. When wavefronts travel along the normal, the whole wavefront enters the glass at different times. This means that each part of the wavefront slows down together and the wave does not change direction. When wavefronts travel along the normal, half of the wavefront enters the glass at the same time. This means that each part of the wavefront slows down together and the wave does not change direction.	33%
First	First	Last	Quiz Score Total	Question 3	Image 3a	3a) Select the diagram that shows the wavefronts on the peaks of the waves?	Question 3b	Image 3b1	3bi) Select the diagram below that shows what happens to the wavefronts at the boundary?	3bii) Select the statements that apply to the diagram above?	Image 3b2	3biii) Select the diagram below that shows what happens to the wavefronts at the boundary?	3biiii) Select the statements that apply to the diagram above?	Question 3c	Image 3c	3c) Why does the direction not change?	Quiz Percentage Grade