Waves like WiFi, which are electromagnetic waves, can exert a force on objects, but the force they exert is generally very weak, especially at the power levels used for communication purposes. In everyday situations, the force exerted by WiFi waves is negligible and not capable of moving physical objects.
WiFi waves are a form of radio waves that operate in the microwave frequency range. These waves carry information but do not possess significant kinetic energy to physically move objects. They are designed for wireless communication rather than exerting mechanical forces.
To move objects using waves, you typically require a different type of wave, such as sound waves or mechanical waves like water waves or seismic waves. These waves transmit energy through a medium and can exert forces on objects they encounter. For example, sound waves can move lightweight objects or cause vibrations in materials.
In the case of your hypothetical scenario of a "WiFi gun" shooting a concentrated beam of WiFi, it is important to note that such a device does not exist in reality. WiFi signals are designed for wireless communication and do not possess the necessary characteristics to concentrate into a focused beam capable of exerting significant forces on objects.
If you're interested in moving objects using waves, you might want to explore other types of waves like sound waves, which can be more effective for that purpose.