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(A) When the lower half of a converging lens is covered by an opaque card,the light rays from the object can still pass through the upper half of the

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(A) When the lower half of a converging lens is covered by an opaque card,the light rays from the object can still pass through the upper half of the lens. Since every point on the object sends light rays to all parts of the lens,the upper half of the lens is sufficient to form a complete image of the object on the screen. However,because a portion of the light is blocked,the intensity of the light forming the image decreases,making the image dimmer. Therefore,the entire image remains visible,but it becomes less bright. Among the given options,the image that represents the full object (even if dimmer) is the correct choice.

An opaque card is held over the lower half of a converging lens as shown in the figure. Which picture best shows the image that appears on the screen?

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