Polaroid sunglasses reduce glare because reflected light from a horizontal surface is
Correct answer: A. partially polarised in the horizontal plane, which the filter blocks
- A. partially polarised in the horizontal plane, which the filter blocks
- B. of a different frequency
- C. travelling faster
- D. already absorbed by the surface
Explanation
Reflection off water or a road partially polarises the light horizontally, so a filter oriented to transmit only vertical vibrations removes most of the glare while passing ordinary light. This works only because light is a transverse wave. Rotating the glasses through 90 degrees makes the glare reappear, which is a simple demonstration of the effect.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
Practise Optics
665 free Optics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 11 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Optics questions
The sky appears blue because
In a compound microscope, the objective lens forms an image that is
Diffraction of light becomes noticeable when the size of the obstacle or aperture is
The least distance of distinct vision for a normal human eye is about
For a lens, the relationship between object distance, image distance and focal length is
Optics does not deal with ___________?