Consider the He–Ne laser beam with power P = 0.5 mW, and wavelength in vacuum λo = 632.8 nm, as it travels in the x-direction in an experimental vacuum system at NASA-JPL. Show all work .

a. Knowing that the laser beam intensity, I (W/m^2 ), equals the time average value of the Poynting Vector, Sav= E^2max/2μo^2c , then calculate the maximum amplitude of the electric field for this laser beam.
b. Calculate the magnitude of the magnetic induction, Bmax.

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

If a simple machine reduces the strength of a force, what must be increased?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?