Polarisation and diffraction Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. Which wave cannot be plane polarised?
- A. Light
- B. Microwaves
- C. Sound in air
- D. Radio waves
2. Plane-polarised light passes through a second polarising filter whose axis is at 90° to the plane of polarisation. What is the intensity of the transmitted light?
- A. Half of the original
- B. Almost zero
- C. The same as the original
- D. Double the original
3. Water waves of wavelength 2 cm pass through a gap. Which gap gives the most diffraction?
- A. 20 cm wide
- B. 50 cm wide
- C. 1 m wide
- D. 2 cm wide
4. Which statement about diffraction of waves through a gap is correct?
- A. The wavelength is unchanged after the gap
- B. The wavelength increases after the gap
- C. The speed decreases after the gap
- D. The frequency increases after the gap
5. In Huygens' construction, what forms the new wavefront?
- A. The first wavelet to leave the source
- B. The envelope of the secondary wavelets
- C. The wavelet from the centre of the gap
- D. The sum of the frequencies of the wavelets