Light is invisible until the light hits a suface. So when the light leaves the light source (say a lightbulb)the light will travel in the air as a invisible ray and will show up as soon as an object crosses the path of the invisible ray of light.
They keep going in a straight line, either forever, or until . . .
-- they hit something that reflects them, or
-- they cross a boundary between media, or a steadily-changing medium,
than bends them, or
-- they run into something that absorbs them.
It Reflects
light source
Nuclear fusion.
Solar-powered batteries have solar panels that allow the battery to charge itself. It charges when exposed to the sun or any other type of lighting source, including a lamp in your living room to a lighting source in your office at work. So if you are in a dark room it will be charged when you expose it to a lighting source.
There is a kind of special sunglasses that allow you to view an eclipse without eye damage. They can usually be purchased from someone at the eclipse site before it starts.
That would depend upon whether the charge used to fire the weapon had its own source of oxygen or not. The explosion is a very rapid oxidation and requires that oxygen to explode. Most modern smokeless powders contain their own oxygen source. If the temperature is hot enough, and that may be difficult in space, it should burn and allow the weapon to fire. If there is an internal source of that oxygen, a gun will fire normally in space. Because of the lack of atmosphere and reduced gravity, the bullet will travel faster and farther.
The leaves are discarded in the autumn to allow a period of dormancy and then in spring they are replaced.
It happens in the leaves, where tiny pores open to allow water out and close to keep water in.
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you cant stop someone from worshipping a persons beliefs can not be changed by anyone other than themselves and they can still worship whatever deity in the privacy of their mind
Stomata
oh heck no
The stoma
stomata
Stomata.
leaves
The sun
Pines have special kind of roots that allow them to store water and their leaves to withold the water that's why they have longer leaves