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Question
Draw a ray diagram to show what happens when a ray of light parallel to the principal axis of a concave lens passes through it.
Solution
The ray diagram below illustrates what happens when a ray of light, parallel to the principal axis, passes through a concave lens. As shown, the ray diverges after passing through the lens, moving away from the principal axis. The diagram includes the concave lens, the principal axis, and the direction of the incoming and outgoing rays.
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