Transparent.
If something is transperent it means that u can see through it, and light can be able to pass through it. If a speach is transparent; it means it was made clearly and so easy for people to understand.
If there is any light shining on one's body, then one surely can be able to see clearly oneself.
No
Enough light gets through so that you can see the image clearly.
yes
opaque
horizontal waves only
yes. if light didn't travel through air, then you wouldn't be able to see anything!
It means its not transparent. Light cannot pass through it. When something is opaque, you can't see through it. It also can mean that the object does not reflect light, an object without luster. Here are some materials that light can't travel through: a teddy bear, wood, computers and some clay.
light and sound have to be generated from an object! Although light can travel through space with no air, sound can not as it needs something to travel through.You are able to shoot a gun in space and it will not be heard!
That surface would be called a "mirror".
Electrons are able to travel close to speed of light.