In a recording studio, a condenser microphone is often used. These microphones are much more sensitive than dynamic microphones. Since the singer in the studio is usually hearing the accompaniment through headphones, the microphone can afford to be more sensitive at a much lower volume.
They pick up many more subtleties and provide a deeper and more detailed sound than dynamic mics. Condenser mics also contain a capacitor and therefore need electric power to run. When singing into a condenser mic, you can afford to be a little further back from it. However, there is generally a best position or "sweet spot" where your voice will sound best. This varies from one voice to another and from one condenser microphone to another, so when you are in a recording situation and are unsure of the sound, it is best to try a few different mics and experiment with the positioning of each one before deciding what sounds best. The recording engineer will usually be able to hear your voice and choose a microphone which will complement it.