An image B is formed of a real point object A by a lens whose optic axis is XY. (a) Draw a ray diagram to locate the lens and its focus point. (b) If A and B are separated by 20 cm along the axis, find the focal length of the lens.
An image B is formed of a real point object A by a lens whose optic axis is XY. (a) Draw a ray
An image B is formed of a real point object A by a lens whose optic axis is XY. (a) Draw a ray diagram to locate the lens and its focus point. (b) If A and B are separated by 20 cm along the axis, find the focal length of the lens.
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