A 26 year old male presented to the dental clinic with pain in the right lower back tooth region. On examination, it was evident that pericoronitis is present with #48. The inherent filtration of the machine used is 3 mm of Aluminium operating at 70 kVp. By the use of this machine, the surface exposure:
Reduces to 20% of the exposure without filtration Reduces to 80% of the exposure without filtration Reduces to 30% of the exposure without filtration Is not reduced at all