A flashlight uses a lons. to spread out light wavesfrom a small bulb.Which lens could be placed in front of theflashlights bulb to spread out light waves?A. flat surface facing the bulbB.convex surface facing the bulbC.Opaque surface facing the bulbD. concave surface facing the bulb
It is important to know that a concave lens spread out the light waves, while a convex lens would the opposite, it focuses the light waves on one point.
Having said that, we can deduct that the right answer is D. concave surface facing the bulb.
