is newspaper being sensitive to light and changing color physical or chemical?

Answer 1

The sensitivity of newspaper to light and its changing color is a physical property. When exposed to light, the components in the newspaper may undergo physical changes, such as fading or discoloration, but the actual composition of the paper remains the same. Chemical changes involve altering the chemical composition of a substance and in the case of newspaper, sensitivity to light is generally a result of physical processes rather than chemical reactions.