# Lesson Worksheet: Polarization of Light Physics • 9th Grade

In this worksheet, we will practice describing the changes to the polarization angle and intensity of light waves produced by polarizing filters.

Q1:

Unpolarized light traveling in air that has a refractive index of 1 reflects from a film of oil. The angle from the normal to the surface of the oil of reflected light that is completely polarized is . What is the refractive index of the oil? Give your answer to one decimal place.

Q2:

Unpolarized light passes through two polarizers that have polarization axes apart from each other. The intensity of the light after it passes through both polarizers is 0.15 W/m2. What is the initial intensity of the light?

Q3:

Unpolarized light passes through two polarizers. The light has an initial intensity of 1.8 W/m2. The intensity of the light after it passes through both polarizers is 0.85 W/m2. What is the angle between the polarization axes of the polarizers?

Q4:

Vertically polarized light with an intensity of 1.25 W/m2 passes through a polarizer aligned at an angle , above the horizontal, as shown in the diagram. What is the intensity of the light transmitted through the polarizer? Give your answer to two decimal places. Q5:

Vertically polarized light enters a diagonally aligned polarizer, as shown in the diagram. Which of the following diagrams correctly shows the polarization angle of the light that emerges from the polarizer? • A • B • C • D • E Q6:

Unpolarized light enters a vertically aligned polarizer, as shown in the diagram. Which of the following diagrams correctly shows the polarization angle of the light that emerges from the polarizer? • A • B • C • D • E Q7:

Unpolarized light with an intensity of 2.4 W/m2 passes through a polarizer aligned at the angle , above the horizontal, as shown in the diagram. What is the intensity of the light transmitted through the polarizer? Q8:

Vertically polarized light with an intensity of 2.2 W/m2 passes through a polarizer aligned at the angle , from the vertical, as shown in the diagram. What is the intensity of the light transmitted through the polarizer? Q9:

Horizontally polarized light enters a vertically aligned polarizer placed in front of a diagonally aligned polarizer, which is placed in front of a horizontally aligned polarizer, as shown in the diagram. Which of the following diagrams correctly shows the polarization angle of the light that emerges from the horizontal polarizer? • A • B • C • D • E Q10:

Vertically polarized light enters a vertically aligned polarizer placed in front of a diagonally aligned polarizer, which is placed in front of a horizontally aligned polarizer, as shown in the diagram. Which of the following diagrams correctly shows the polarization angle of the light that emerges from the horizontal polarizer? • A • B • C • D • E 