When would you use external flash?-  powerful for casting light into a far distance

Do you need to meter the light if you use flash?-  light meters are only necessary for film photographers using studio flash

What does flash synchronization mean?-  the synchronizing the firing of a photographic flash with the opening of the shutter admitting light

What does ETTL mean?-Evaluative through-the-lens and is a type of autoflash exposure system

What will happen when you shoot faster than the camera sync speed?- your shutter will close before the flash can be fully captured by the sensor

Why do photographers bounce the flash and use a diffuser?- used to soften or spread the harsh, concentrated light that bursts out of the flash

What is a Slave?- used to instructs a flash unit to monitor incoming light, and fire when it senses the light produced by another

What should you do if your image comes out too dark or too light?- Recompose The Photo, Use Exposure Lock. Use Fill In Flash