Polarization Practice

10 problems · instant feedback · full explanations

Light is a transverse wave, so its vibration direction matters. Polarizers select one direction — Malus's law I = I₀cos²θ gives the transmitted intensity.

Q1.
Which of these can be polarized?

Multiple choice · Easy

Q2.
Unpolarized light passes through a polarizer, then a second at 60° to the first. What fraction of original intensity emerges? (decimal)

Numerical answer · Medium

Q3.
The angle where reflected light becomes fully polarized is:

Multiple choice · Easy

Q4.
Find Brewster's angle for air (n=1) to glass (n=1.5). (degrees)

Numerical answer (°) · Hard

Q5.
An LCD screen controls light using:

Multiple choice · Medium

Q6.
Polarized 3D glasses work by sending each eye:

Multiple choice · Medium

Q7.
Scattered skylight is partially polarized.

True / False · Easy

Q8.
An ideal polarizer transmits 100% of incident unpolarized light.

True / False · Medium

Q9.
Viewing stressed plastic between crossed polarizers reveals colorful patterns due to:

Multiple choice · Hard

Q10.
Polarized light at 30° to a polarizer axis: what fraction is transmitted? (decimal)

Numerical answer · Hard

Polarization Practice

Q1. Which of these can be polarized?

Q2. Unpolarized light passes through a polarizer, then a second at 60° to the first. What fraction of original intensity emerges? (decimal)

Q3. The angle where reflected light becomes fully polarized is:

Q4. Find Brewster's angle for air (n=1) to glass (n=1.5). (degrees)

Q5. An LCD screen controls light using:

Q6. Polarized 3D glasses work by sending each eye:

Q7. Scattered skylight is partially polarized.

Q8. An ideal polarizer transmits 100% of incident unpolarized light.

Q9. Viewing stressed plastic between crossed polarizers reveals colorful patterns due to:

Q10. Polarized light at 30° to a polarizer axis: what fraction is transmitted? (decimal)