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Answer :
Final answer:
The fuzzy edges of a book's shadow are due to a physics phenomenon called diffraction. Diffraction occurs when light bends or scatters around the edges of an object, causing the fuzzy appearance at the shadow's edge.
Explanation:
The shadow of your book is somewhat fuzzy at the edges due to a physics phenomenon called diffraction. When light comes into contact with the book, which is acting as an obstacle, it bends around the edges and scatters. The scattered light interferes, causing the slightly blurred, or fuzzy edges of the shadow.
For instance, when your book is placed a few inches above a table, with a small lamp above it, this diffraction causes the observed fuzziness.
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Final answer:
The fuzziness around the shadow edges is due to diffraction, which is the bending or spreading out of light waves around the edges of an object. The light from the lamp, which isn't an infinitesimal point source, bends around the edges of the book, making the shadow edges appear fuzzy.
Explanation:
The reason why the shadow of your book appears fuzzy at the edges when held a few inches above a table with a small lamp above it is due to a phenomenon called diffraction. Diffraction is the bending or spreading out of light waves around the edges of an object. With the book and the lamp setup, the light from the lamp is the source of the light waves, and the book acts as the barrier or object which causes diffraction.
The sharpness of a shadow can depend on the size of the light source. The lamp, in this case, isn't an infinitesimal point source, but rather a larger source of light. That means the light is coming from many different points and some of it manages to bend around the edges of the book, making the shadow edges appear less sharp, or 'fuzzy'.
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