Light: Shadows and Reflections

Clear glass, Clean water, Plastic wrap

Transparent materials like clear glass, clean water, and plastic wrap allow light to pass through completely. Cardboard and thick cloth are opaque and block light.

True

This statement is true. Shadows are formed when opaque objects block light from reaching a surface, creating a dark area behind the object.

A light source, An opaque object, A screen

To observe a shadow, we need three things: a source of light, an opaque object to block the light, and a screen (like a wall or ground) where the shadow appears.

same size as object, erect, laterally inverted

A plane mirror forms an image that is the same size as the object, erect (not upside down), and laterally inverted (left appears right). The image cannot be obtained on a screen.