The unsharp edge of the projected image is termed:

Question

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The unsharp edge of a projected image is termed as penumbra. This is because it is an area of partial shadow or blurred outline surrounding the darker shadow (umbra) of an object. Distortion refers to any alteration or deformation of the image, edge loss is a term used for the loss of image detail at the edges of a frame, and margin distortion is not a commonly used term in relation to projected images.

The Unsharp Edge of the Projected Image Is Termed