An unpolarized laser has an average power of 1.600mW. At a distance of 20.0 m it forms a circle with a diameter of 3.50 mm. 3pts. a. Assuming the entire average power of the laser is within the circle of light, what is the intensity of the laser light

The intensity of the light is 49.6 W/m²

Explanation:

Given:

Power, P = 1.6mW

           P = 0.0016 watt

Diameter, d = 3.5mm

radius, r = 3.5 / 2 = 1.75 mm

           r = 1.75 X 10⁻³ m

Area of sphere = 4πr²

A = 4 X 3.14 X ( 1.75 X 10⁻³)²

A = 38.465 X 10⁻6 m²

We know:

Intensity, I = Power / Area

Therefore, the intensity of the light is 49.6 W/m²

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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