A5.4 mw laser beam has its electric field vertical. if it passes through a polarizer with its transmission axis at 60 degree to the vertical, what's the power of the transmitted beam?
2. polarized light passes through a polarizer, and 70 % gets through. find the angle between the light's electric field and the polarizer's transmission axis.

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

Suppose that an electromagnetic wave which is linearly polarized along the x−axis is propagating in vacuum along the z−axis. the wave is incident on a conductor which is placed at z > 0 region of the space. the conductor has conductivity σ, magnetic permeability µ and electric permittivity ε. (a) find the characteristic time for the free charge density which dissipates at the conductor. (b) write the maxwell equations and derive the wave equation for a plane wave propagating in a conductor. (c) find the attenuation distance at which the incident amplitude reduces to e ^−1 of its initial value. (d) find the electric and magnetic fields inside the conductor. 8 (e) find the power loss per area of the incident electromagnetic wave at the surface of conductor.

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?