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For dry air at a temperature of 0∘C and at 1 atm of pressure, electric breakdown occurs when the air is subjected to an electric field with amplitude above about 3.00 MV/m. A high-power laser is shone up into Earth's atmosphere, and the laser's associated electric field ionizes the air and turns it into a conducting plasma. Assume the conditions of the air are such that an electric field of 3.00 MV/m causes the air to ionize. (a) What will be the intensity (in W/m2) of a laser beam that can produce a field of this magnitude? W/m2 (b) Assuming the laser is operating at this maximum intensity, what is the power (in W) delivered in a cylindrical beam with a diameter of d = 4.55 mm? W

For dry air at a temperature of 0∘C and at 1 atm of pressure, electric breakdown occurs when the air is subjected to an electric field with amplitude above about 3.00 MV/m. A high-power laser is shone up into Earth's atmosphere, and the laser's associated electric field ionizes the air and turns it into a conducting plasma. Assume the conditions of the air are such that an electric field of 3.00 MV/m causes the air to ionize. (a) What will be the intensity (in W/m2) of a laser beam that can produce a field of this magnitude? W/m2 (b) Assuming the laser is operating at this maximum intensity, what is the power (in W) delivered in a cylindrical beam with a diameter of d = 4.55 mm? W

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For dry air at a temperature of 0 ∘ C and at 1 a t m of pressure, electric breakdown occurs when the air is subjected to an electric field with amplitude above about 3.00 M V / m . A high-power laser is shone up into Earth's atmosphere, and the laser's associated electric field ionizes the air and turns it into a conducting plasma. Assume the conditions of the air are such that an electric field of 3.00 MV/m causes the air to ionize. (a) What will be the intensity (in W / m 2 ) of a laser beam that can produce a field of this magnitude? ◻ W / m 2 (b) Assuming the laser is operating at this maximum intensity, what is the power (in W) delivered in a cylindrical beam with a diameter of d = 4.55 m m ? W

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