How does radiation travel, and what kinds of damage can it do?
The nuclear disaster in Japan has left many people in danger of exposure to radiation and radioactivity. Some are simply fearful. What exactly is this radiation? And what threat does ... a vacuum, or through air or water. They can also cut through light ...
Camera sensor size: Why does it matter and exactly how big are they?
Why is camera image sensor size important? The size of sensor that a camera has ultimately determines how much light ... to do this because they need to be moved further away from a subject, or use a wider angle (and much faster) lens, to take the same ...
How long does it take sunlight to reach the Earth?
Here's a question… how long does it take sunlight to reach Earth? This sounds like a strange question, but think about it. Sunlight travels at the speed of light. Photons emitted from the surface of the Sun need to travel across the vacuum of space to ...
How Many Earths Would It Take To Sustain Your Lifestyle?
“Consumer Consequences” is an online “game” where you enter data about your living, work, travel, energy, and eating patterns, then see how many earths would be needed ... mainly because of the amount of take-out food we order every month.
How Many eHam Posters Does it Take?
Aw its going to be on the new license exam for the entry levels. also they will have to assemble a schematic of their circuit, also they will have to do a thesis white paper reading and that will be also a exam on that too. and nosiree not on blue or pink ...