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Railways PYQCBT 1 2016

RRB NTPC · Question 70

While watching 3D movies at the theatre, we have to wear special glasses because?

  1. The glasses allow our left and right eyes to see different images

  2. 3-D movies use special colors which cannot be sensed by the human eye

  3. 3-D movies are brighter than ordinary movies and can hurt our eyes if seen directly

  4. The glasses allow both the eyes to see similar images

Show answer & explanation

Answer: (A) The glasses allow our left and right eyes to see different images

Explanation

A 3D film shows two slightly different images. Polarised (or shutter) glasses send one image to each eye, and the brain merges them into a sense of depth.