**Problem : **
A polaroid sheet and an analyzer are placed such that their transmission axes are co-linear. The
analyzer is then rotated by 22.5^{o}. What is the irradiance of the transmitted light as a fraction
of its previous value?

**Problem : **
You have three ideal linear polarizers. Light of irradiance 1000 W/m^{2} is shone through two of the
polarizers, with their transmission axes placed at a relative angle of 40^{o}. What is the intensity
of the transmitted light? Now place the third polarizer at an angle of 20^{o} between the other two.
What is the irradiance?

**Problem : **
What is Brewster's angle for reflection from air off a glass (*n* = 1.52) surface?

**Problem : **
Consider the following waves:

E_{x} | = E_{x}cos(kz - σt) | ||

E_{y} | = E_{y}sin(kz - σt + 2Π) |

If these waves overlap at a particular point, what is the polarization of the resulting wave (assume

**Problem : **
Write the equation for the linearly polarized light wave of angular frequency *σ* and amplitude
*E*_{0} propagating along the x-axis with its plane of vibration at 30^{o} to the *xy*-plane (assume
that **E** = 0 when *x* = 0 and *t* = 0).

E(x, t) = (/2 +1/2)E_{0}sin(kx - σt) |

This satisfies the condition at

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