Phys 1.5 - Lenses 4.0 / 5 based on 1 rating ? PhysicsLight and OpticsGCSEAQA Created by: DanCreated on: 02-05-13 20:46 How do lenses work? Parallel rays of light pass through a lense and meet at a single point 1 of 14 What is the name of this point where light meets? Principle focus or focal point 2 of 14 How is the focal length determined? The distance of the focal point to the centre of the lense 3 of 14 There are 2 focal points, why? Light can pass through a lense on both sides, there's one focal point each side of the lense 4 of 14 If an object is further away from the lense than the focal point, what sort of image is formed? An inverted, real, magnified image is formed 5 of 14 How is magnification calculated? magnification = Image height / Object height 6 of 14 What does the size of the image depend on? How close the object is to the lense 7 of 14 if the image is nearer to the lense than the focal point, what sort of image is formed? An upright, virtual, magnefied image is formed 8 of 14 What does diverge mean? The rays of light seperate 9 of 14 What does converge mean? The rays of light meet at a single point 10 of 14 How does a diverging lense have a focal point if the light seperates? The direction the light diverges can be used to find a focal point the other side of the lense 11 of 14 Images produced by diverging lenses are always? Virtual 12 of 14 Axis arrows on a graph of a diverging lense point what way? Inward or outward? Arrows point inwards 13 of 14 Axis arrows on a graph of converging lense point what way? inward or outward? Arrows point outward 14 of 14
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