Light in PhysicsA series of free High School Physics Video Lessons from Brightstorm online Physics series.
Physics Mirrors Physics mirrors are where light can be reflected and reconvened to form images. Two different types of mirror are concave and convex mirror with different properties. Two types of image formed by mirrors are real image and virtual image. Real image is formed when the light reconvenes and always inverted (i.e., upside down). Virtual image is formed when the light goes through and does not reconvene and is always erect (i.e., right side up).
Physics Lenses Lenses are curved glasses or transparent materials. The focus of convex lenses is where rays parallel to principal axis go. The focus of the concave lenses is where rays parallel to principal come from. A converging lens looks fat in the middle. A diverging lens looks thin in the middle
Ray Diagrams All lenses and mirrors can use ray diagrams to find images. There are three principal rays. The first principal ray occurs when the light comes in parallel to the principle axis, it goes out through the focus. The second principal ray occurs when light comes in through the focus, then it comes out parallel to the principle axis. The third principal ray occurs when the light goes straight through the vertex without changing its direction
Lens Equation The lens equation allows us to understand geometric optic in a quantitative way where 1/d0 + 1/di = 1/f. The lens equation essentially states that the magnification of the object = - distance of the image over distance of the object.
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