The damage threshold for the retina is 100 W/m². This means that a damage to the retina can occur at an average intensity greater than this. The light coming from a 5.0 mW green laser has a diameter of 1.2 mm. (a) Will this laser exceed the damage threshold for the retina? (b) What are the maximum values of the electric and magnetic fields of the beam coming from this laser? 2.

Estimate the radiation pressure due to a 75 W bulb at a distance of 7.8 cm from the center of the bulb. Express your answer to two significant figures and include the appropriate units. ? Prad = Value Units Estimate the force exerted on your fingertip if you place it at this point. Assume that the area of a fingertip is 1.3 cm? Express your answer to two significant figures and include the appropriate units. | ? F = Value Units

A 14.0-mW helium-neon laser emits a beam of circular cross section with a diameter of 2.85 mm. (a) Find the maximum electric field in the beam. kN/C (b) What total energy is contained in a 1.00-m length of the beam? pJ (c) Find the momentum carried by a 1.00-m length of the beam. kg. m/s

The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 1.30 mm in diameter, what is its intensity? 1.88e2 W/m2 (b) Find the peak electric field strength. 1.255e-6 What is the relationship between intensity and electric field strength? V/m (c) Find the peak magnetic field strength. 3.765e-6 What is the relationship between electric field strength and magnetic field strength in an electromagnetic wave? T

The helium-neon lasers most commonly used in student physics laboratories have average power outputs of 0.250 mW. (a) If such a laser beam is projected onto a circular spot 3.64 mm in diameter, what is its intensity?                W/m2 (b) Find the peak electric field strength.                 V/m (c) Find the peak magnetic field strength.                  T

Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of 0.49 mW. (a) If such a laser beam is projected onto a circular spot 1.3 mm in diameter, what is its intensity? I= W m (b) Find the peak magnetic field strength. Bo= T (c) Find the peak electric field strength. E₁= V m

What is the displacement current density? a) The current density due to the motion of charges in a conductor. b) The current density due to the motion of charges in a dielectric. c) The current density that arises from time-varying electric fields in free space. d) The current density that arises from the magnetic fields produced by moving charges. In what form can Ampere-Maxwell's equation be written in the absence of a time-varying electric field? a) V. E = p/ɛo b) VxE=-ƏB/ət c) V x H = J d) VB=0 What does the integral form of Ampere-Maxwell's equation relate to? a) The electric field generated by a time-varying magnetic field. b) The magnetic field generated by a time-varying electric field. c) The relationship between the current density and the magnetic field. d) The behavior of electromagnetic waves in free space. e) None In the integral form of Ampere-Maxwell's equation, what does the surface integral of the displacement current density represent? a) The total charge enclosed by…