Polarization of light

Answer Key - Grade 11 Science Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   Polarized light of 100 W/m² meets a filter, and 75 W/m² passes. At what angle is the filter turned, to 0.01°, Ari?

   30 °
2. 2.

   Polarized light of 80 W/m² meets a filter, and 20 W/m² passes. At what angle is the filter turned, to 0.01°, Esme?

   60 °
3. 3.

   Unpolarized light passes filters at 0°, 45° and 90° in turn. What fraction of the light gets through, Jun?

   • No light gets through
   • One-half
   • One-eighth
4. 4.

   Unpolarized light of 160 W/m² passes filters at 0°, 30° and 90°. What intensity leaves the last one, Kira?

   • 0 W/m²
   • 15 W/m²
   • 60 W/m²
5. 5.

   In a row of filters, which angle goes into each Malus's law step, Luz?

   • The angle from the very first filter
   • 45° each time
   • The angle between neighbors
6. 6.

   Milo says a polarizing filter could cut the noise from a loudspeaker. Agree or disagree?

   • Disagree: sound can't be polarized
   • Agree: sound vibrates side to side
   • Agree: filters can block any kind of wave
7. 7.

   Noah says longitudinal waves can be polarized like light. Agree or disagree?

   • Agree: longitudinal waves are transverse
   • Disagree: they vibrate along their path
   • Agree: any wave can be polarized
8. 8.

   Pia says polarized light through a filter at 45° loses about 29% of its intensity. Agree or disagree?

   • Agree: cos 45° ≈ 0.71
   • Disagree: it loses half
   • Agree: it loses 45%
9. 9.

   One of two filters is turned through a full circle. How many times does the light go dark, Ren?

   • Once
   • Twice
   • Four times
10. 10.

    Unpolarized light passes a single filter that is slowly turned. What happens to the light, Zee?

    • It stays at half brightness
    • It goes dark once a turn
    • It goes dark twice a turn