and described by the formula: where A is the amplitude of oscillation, f is the frequency, t is the elapsed time, and is the phase of the oscillation. The phase determines or is determined by the initial displacement at time t = 0. A motion with frequency f has period. Two potential ambiguities can be noted:
Incubation Period Shingles is not transmitted from exposure to another infected person so there is no applicable incubation period. Anyone who has recovered from varicella may develop shingles. Mode of Transmission Transmission of the virus occurs through direct contact with the rash or fluid from the lesions.
What is the incubation period for a poison ivy rash? Dermatologists suggest that the first exposure to poison ivy has an incubation period of about five to 21 days before the rash appears. However, repeated exposure to poison ivy results in the rash appearing more quickly (about 12-48 hours).