In Star Wars they shoot lasers from cannons and guns but how come they are stopped by forcefields?
How can it be that lasers are light and the forcefields allow the ships to be visible but don't allow lasers to go through?
In Star Wars they shoot lasers from cannons and guns but how come they are stopped by forcefields?
How can it be that lasers are light and the forcefields allow the ships to be visible but don't allow lasers to go through?
The very short answer is that cannons (turbolasers) and guns (blasters) in the Star Wars universe aren't firing lasers, they're firing energetic plasma. That plasma is deflected or dissipated by shields which are generally tuned to keep it out.
Shields come in a variety of flavours; deflectors, ray shields, personal shields, planetary shields, etc. Their mechanics and operation are discussed in the Force Awakens Visual Dictionary. They tend to either deflect/absorb the energy or scatter/dissipate it.