DISCUSS: Light Cone from a Flashlight A flashlight is held to form a lighted area on the ground, as shown in the figure. Is it possible to angle the flashlight in such a way that the boundary of the lighted area is a parabola? Explain your answer.
Whether it is possible to set the flashlight in such a way that the boundary of lighted area form a parabola on the ground.
Parabolas are the set of points in one plane that forms a U shaped curve. The curve could be opening upward, opening downward, opening left or opening right.
A parabola bounded by lighted area of a flashlight can be formed at all the angles except or vertically straight to the ground. There will always be a parabola forming on the ground whenever the flashlight is tilted towards the ground
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