However, in this case, since the light rays don't really come from here, we call it a virtual focal point.Concave lenses are used in things like TV projectors to make light rays spread out into the distance. In a flashlight, it's easier to do this job with a mirror, which usually ...
Even though light is bouncing off the mirror, our eyes are fooled into thinking it's coming out of the mirror in a straight line. The virtual image can't be focused, but some mirrors, like concave mirrors, can produce a real image, which can be projected onto a surface. Types of ...
How do you see your reflection in a plane mirror? explain.What is the effect on measurements if the lens is not mounted perpendicular to the light rays?How a concave mirror is used in headlights and searchlights to throw light at a long-distance?
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