Which object is least likely to allow light to pass through it?

Which object is least likely to allow light to pass through it?

• A. a pair of eyeglasses
• B. a clear water bottle
• C. a car windshield
• D. a tree trunk

Answer: (D)

Light transmission through materials depends on how transparent they are. Transparent or clear materials, like eyeglasses and a water bottle, let most light pass with little scattering. A car windshield is also designed to be see-through, so it transmits light well. A tree trunk is opaque, meaning it absorbs and scatters most of the light that hits it, so hardly any light passes through. That makes the tree trunk the object least likely to let light pass through.

Light transmission through materials depends on how transparent they are. Transparent or clear materials, like eyeglasses and a water bottle, let most light pass with little scattering. A car windshield is also designed to be see-through, so it transmits light well. A tree trunk is opaque, meaning it absorbs and scatters most of the light that hits it, so hardly any light passes through. That makes the tree trunk the object least likely to let light pass through.