diffraction
When a wireless signal encounters an obstruction, such as a wall, it can split into secondary waves that scatter in different directions. This phenomenon, known as diffraction, allows the signal to diffract around obstacles and reach areas that would otherwise be blocked. However, this can also lead to signal degradation and interference, impacting the overall signal quality.
It you can pick up Internet signal without hooking an ethernet cord into your computer. You can get the wireless signal in the wireless routers range.
You could attach an external directional antenna. Google for 'wireless antenna'.
No, With most wireless cameras; they rely on a wireless routers signal to work.
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A wireless repeater is simply a device that receives wireless signals and repeats the signal to extend the distance the wireless signal can travel. The end result is that devices can be used further away from the wireless router.
According to Life123.com, "If you're experiencing wireless signal issues, you can always add a wireless signal amplifier. An amplifier connects to your wireless router and boosts the signal output, typically by connecting to where your antenna connects. Wireless signal amplifiers also boost the receiving capabilities of your wireless router, ultimately increasing your network speed and ensuring that you never lose signal." You can buy them here (see related links).
The strength of a wireless security camera's signal would depend on the camera in question. Some of the wireless security cameras are said to be about 900 mhz.
If you do not see signal from your router, it means that the signal is not strong enough an you need to get a wireless extender or a better router.
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This a location that "broadcasts" wireless signal. Some fast food restaurants for example offer free "wifi", which is wireless signal for customers to use while they dine at the restaurant.
It has an access point which transmit signal to the client and receive.