5-27.3 Transparency and Opacity

Glass is transparent to visible light, but mostly opaque to...

• infrared

• ultraviolet

• both

• neither

Transparency is caused by the _____ of light waves.

• transmission

• reflection

• absorption

• refraction

Transmission of light waves depends on the passing of energy from one _____ to the next.

• 1. atom

• 1. neutron

• 1. fiber

• 1. wavelength

Translucent objects let some light pass through, sometimes only certain colors.

• True

• False

Electrons in atoms interact with light

• at all frequencies

• at low frequencies

• at high frequencies

• only at very specific frequencies

Shadows are formed when an __________ object comes in the path of light.

• transparent

• reflective

• polarized

• opaque

What is the center, darker part of an eclipse shadow called?

• Perinumbra

• Hyperumbra

• Penumbra

• Umbra

What is the lighter part of an eclipse shadow, where the light is only partially blocked, called?

• Perinumbra

• Hyperumbra

• Penumbra

• Umbra

Which letter or letters in the picture identify the penumbra?

• A

• B

• C

Which letter or letters in the picture identify the umbra?

• A

• B

• C