Intensity is the amount of energy a wave carries per unit time over an area of one unit area, which is equal to the energy density multiplied by the velocity of the wave. Usually measured in watts / square meters. The intensity depends on the intensity and amplitude of the wave. Intensity is represented by I.
The intensity formula is expressed as:
I = P/A
A= area of cross-section
1. Do you want to calculate the strength of a wave with a power of 25KW and a cross-section of 35x106m2?
P = 25 KW = 25×103 W, A =35×106m2
I = 25×103 /35×106
2. Do you calculate the power of waves with intensity and cross-section of 30 × 10-5W / m2 and 50m2 respectively?
I= 30×10-5 W/m2
A= 50 m2
I = P/A
P = I x A
P = 30×10-5 x 50
P= 0.015 W