Convex Lenses 1 – Hollms School

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First	First	Last	Quiz Score Total	Question 1a	Convex lenses are ............ at the centre than at the edges.	Question 1b	1b) Select the diagram below that shows the correct principal focus and focal length?	1c) Why does the ray passing through the centre of the lens does not change direction?	Quiz Percentage Grade
ppefmh	Ed	Garstin	1/3	1a) Select the correct missing word in the sentence below.	thicker thinner the same	The diagrams below show light rays passing through a convex lens.		This is because it is travelling along the normal. As we saw in the chapter on refraction, light rays which travel along the normal do not change direction when they change medium. This is because it is travelling along the angle of incidence. As we saw in the chapter on refraction, light rays which travel along the angle of incidence do not change direction when they change medium. This is because it is travelling along the angle of reflection. As we saw in the chapter on refraction, light rays which travel along the angle of reflection do not change direction when they change medium.	33%
First	First	Last	Quiz Score Total	Question 1a	Convex lenses are ............ at the centre than at the edges.	Question 1b	1b) Select the diagram below that shows the correct principal focus and focal length?	1c) Why does the ray passing through the centre of the lens does not change direction?	Quiz Percentage Grade