Name Lens 1. A single ray is shown that is parallel to the optic axis. It hits t

Question

Name Lens 1. A single ray is shown that is parallel to the optic axis. It hits the lens and is redirected as shown. a. Mark a focal point of the lens with a big dot. If you need to extend the direction of a ray to show where it "appears" to come from, use a dashed line. b. Is this a converging or diverging lens? What is the focal length? 2. The lens (like all lenses) has two focal points, equidistant and on opposite sides of the lens. This lens is the same as the lens above. Place a big dot at each focal point.

Explanation / Answer

(a) As seen ray is parallel to optical axis so it wil cut the optical axis at focal length

so focal length is point on optical axis where ray is cutting it

As rays are converging so lens is converging lens (Convex Lens)

focal length=8 units

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