While looking at an image formed by a convex lens (one half of the lens is covered with a black paper), which one of the following will happen to the image?

When one-half of a convex lens is covered with black paper, the lens still produces a complete image of the object. This occurs because every point on the object emits light rays that pass through all parts of the lens; therefore, even if half the lens is blocked, light rays from every part of the object can still pass through the remaining uncovered half to converge and form a full image. However, because the total number of light rays contributing to the image formation is reduced by half, the amount of light reaching the image point decreases. Consequently, the image remains the same size and orientation but becomes dimmer, meaning its intensity is diminished. Experimental verification confirms that while the image is complete, it is significantly fainter than when the entire lens is used.