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What does a Convex lens cause rays of light to do?
What does a Concave lens cause rays of light to do?
Where the rays hitting the lens parallel to the axis meet
Where is the principal focus on a Convex lens?
Where the rays hitting the lens parallel to the axis appear to all come from
Where is the principal focus on a Concave lens?
The focal length
What is the distance from the centre of the lens to the principal focus called?
Is the image formed by a Convex lens real or virtual?
Is the image formed by a Concave lens real or virtual?
Changes the direction of light as it passes from one medium to another
What does refraction do?
By refracting light
How does a lens form an image?